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		<h1>ĐỀ KIỂM TRA CUỐI HỌC KÌ II - TOÁN LỚP 8</h1>
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			<td style="width:234px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><a name="_Hlk78398503">PHÒNG GD THANH OAI</a></span></span><br />
			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">TRƯỜNG THCS THAN THÙY</span></span><br />
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			<td style="width: 409px; padding: 0in 7px; text-align: center;" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>ĐỀ KIỂM TRA CUỐI HỌC KÌ II</b></span></span><br />
			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>NĂM HỌC 2020 - 2021</b></span></span><br />
			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>MÔN: TOÁN LỚP 8</b></span></span><br />
			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><i>Thời gian làm bài: </i><i>6</i><b><i>0 phút</i></b></span></span></td>
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt">Đề 2</span></b></span></span><br />
<br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:black">Câu 1:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:black">Phântíchđathức 8x<sup>3</sup>&nbsp;+ 12x<sup>2</sup>y + 6xy<sup>2</sup>&nbsp;+ y<sup>3</sup>&nbsp;thànhnhântử ta được</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">A. (x + 2y)<sup>3</sup></span></span><span style="font-size:14.0pt"><span style="color:red"> B.</span></span><span style="font-size:14.0pt"><span style="color:black"> (2x + y)<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;C. (2x – y)<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. (8x + y)<sup>3</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:black">Câu 2:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:black">Chọncâu&nbsp;<b>sai.</b></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">A. x<sup>2</sup>&nbsp;– 6x + 9 = (x – 3)<sup>2</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 4x<sup>2</sup>&nbsp;– 4xy + y<sup>2</sup>&nbsp;= (2x – y)<sup>2</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">C.&nbsp;<img alt="Trắc nghiệm Phân tích đa thức thành nhân tử bằng phương pháp dùng hằng đẳng thức có đáp án" id="Picture_x0020_15" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image001.png" style="width:116.25pt; height:35.25pt" /> </span></span><span style="font-size:14.0pt"><span style="color:red"> D</span></span><span style="font-size:14.0pt"><span style="color:black">. -x<sup>2</sup>&nbsp;– 2xy – y<sup>2</sup>&nbsp;= -(x – y)<sup>2</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">3:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Cho m bấtkỳ, chọncâu&nbsp;<b>đúng</b>?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">. m - 3 &gt; m – 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. m - 3 &lt; m - 4</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">C. m - 3 = m – 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. Cả A, B, C đềusai</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">4:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Biếtrằng m &gt; n với m, n bấtkỳ, chọncâu&nbsp;<b>đúng</b>?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> m - 3 &gt; n – 3&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;B. m - 3 &lt; n - 3</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">C. m - 3 = n - 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. Cả A, B, C đềusai</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">5:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Cho biết a &lt; b. Trongcáckhẳngđịnhsau, sốkhẳngđịnh&nbsp;<b>sai&nbsp;</b>là?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">(I) a - 1 &lt; b – 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (II) a - 1 &lt; b&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (III) a + 2 &lt; b + 2</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">D.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> 0</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:.25in 148.5pt 274.5pt 418.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">Câu</span></span></span></b><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">6:</span></span></span></b>&nbsp;<span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">Phương trình nào sau đây là phương trình bậc nhất một ẩn?</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>A.</b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image002.wmz" style="width:69pt; height:17.25pt" /> </span></span></span>;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> 4y – 8x = 0;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">C.</span></b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:14.0pt"><img alt="" id="_x0000_i1026" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image003.wmz" style="width:63pt; height:36pt" /> </span></span></span>;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:13.0pt"><img alt="" id="_x0000_i1027" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image004.wmz" style="width:57.75pt; height:35.25pt" /> </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">7:</span></span></b>&nbsp;<span lang="FR" style="font-size:14.0pt">Trongcácphươngtrìnhsau, phươngtrìnhnàokhôngcómộtnghiệmduynhất ?</span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">A. 8 + x = 4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 2 – x = x – 4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">&nbsp;C.</span> 1 + x = x.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. 5 + 2x = 0.</span></span></span></span>

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			<td style="width:234px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">PHÒNG GD THANH OAI</span></span><br />
			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">TRƯỜNG THCS THAN THÙY</span></span><br />
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			<td style="width:409px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>ĐỀ KIỂM TRA CUỐI HỌC KÌ II</b></span></span><br />
			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>NĂM HỌC 2020 - 2021</b></span></span><br />
			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>MÔN: TOÁN LỚP 8</b></span></span><br />
			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><i>Thời gian làm bài: </i><i>6</i><b><i>0 phút</i></b></span></span></td>
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt">Đề 2</span></b></span></span><br />
<br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:black">Câu 1:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:black">Phântíchđathức 8x<sup>3</sup>&nbsp;+ 12x<sup>2</sup>y + 6xy<sup>2</sup>&nbsp;+ y<sup>3</sup>&nbsp;thànhnhântử ta được</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">A. (x + 2y)<sup>3</sup></span></span><span style="font-size:14.0pt"><span style="color:red"> B.</span></span><span style="font-size:14.0pt"><span style="color:black"> (2x + y)<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. (2x – y)<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. (8x + y)<sup>3</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:black">Câu 2:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:black">Chọncâu&nbsp;<b>sai.</b></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">A. x<sup>2</sup>&nbsp;– 6x + 9 = (x – 3)<sup>2</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 4x<sup>2</sup>&nbsp;– 4xy + y<sup>2</sup>&nbsp;= (2x – y)<sup>2</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">C.&nbsp;<img alt="Trắc nghiệm Phân tích đa thức thành nhân tử bằng phương pháp dùng hằng đẳng thức có đáp án" id="Picture_x0020_8" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image001.png" style="width:116.25pt; height:35.25pt" /> </span></span><span style="font-size:14.0pt"><span style="color:red"> D</span></span><span style="font-size:14.0pt"><span style="color:black">. -x<sup>2</sup>&nbsp;– 2xy – y<sup>2</sup>&nbsp;= -(x – y)<sup>2</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">3:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Cho m bấtkỳ, chọncâu&nbsp;<b>đúng</b>?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">. m - 3 &gt; m – 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. m - 3 &lt; m - 4</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">C. m - 3 = m – 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. Cả A, B, C đềusai</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">4:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Biếtrằng m &gt; n với m, n bấtkỳ, chọncâu&nbsp;<b>đúng</b>?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> m - 3 &gt; n – 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. m - 3 &lt; n - 3</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">C. m - 3 = n - 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. Cả A, B, C đềusai</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">5:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Cho biết a &lt; b. Trongcáckhẳngđịnhsau, sốkhẳngđịnh&nbsp;<b>sai&nbsp;</b>là?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">(I) a - 1 &lt; b – 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (II) a - 1 &lt; b&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (III) a + 2 &lt; b + 2</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">D.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> 0</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:.25in 148.5pt 274.5pt 418.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">Câu</span></span></span></b><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">6:</span></span></span></b>&nbsp;<span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">Phương trình nào sau đây là phương trình bậc nhất một ẩn?</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>A.</b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1028" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image002.wmz" style="width:69pt; height:17.25pt" /> </span></span></span>;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> 4y – 8x = 0;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">C.</span></b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:14.0pt"><img alt="" id="_x0000_i1029" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image003.wmz" style="width:63pt; height:36pt" /> </span></span></span>;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:13.0pt"><img alt="" id="_x0000_i1030" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image004.wmz" style="width:57.75pt; height:35.25pt" /> </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">7:</span></span></b>&nbsp;<span lang="FR" style="font-size:14.0pt">Trongcácphươngtrìnhsau, phươngtrìnhnàokhôngcómộtnghiệmduynhất ?</span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">A. 8 + x = 4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 2 – x = x – 4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">&nbsp;C.</span> 1 + x = x.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. 5 + 2x = 0.</span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">Câu</span></span></span></b><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">8:&nbsp;</span></span></span></b><span style="font-size:14.0pt"><span style="line-height:115%">Điềukiệnxácđịnhcủaphươngtrìnhcủaphươngtrình<span style="position:relative"><span style="top:16.0pt"><img alt="" id="Picture_x0020_9" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image005.wmz" style="width:141.75pt; height:35.25pt" /> </span></span>là:</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">A.x</span><i><span style="font-size:14.0pt"><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">≠</span></span></i><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image006.png" style="width:10.5pt; height:16.5pt" /> </span></span></span></span><span style="font-size:14.0pt"> 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">B.</span> x </span><i><span style="font-size:14.0pt"><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">≠ ±</span></span></i><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image007.png" style="width:27.75pt; height:16.5pt" /> </span></span></span></span><span style="font-size:14.0pt">1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. x </span><i><span style="font-size:14.0pt"><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">≠ -1</span></span></i><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image008.png" style="width:36pt; height:16.5pt" /> </span></span></span></span><span style="font-size:14.0pt">&nbsp; D. x </span><i><span style="font-size:14.0pt"><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">≠0</span></span></i><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image009.png" style="width:21.75pt; height:16.5pt" /> </span></span></span></span><span style="font-size:14.0pt">&nbsp;và <span style="position:relative"><span style="top:3.0pt"><img alt="" id="Picture_x0020_10" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image010.wmz" style="width:33.75pt; height:14.25pt" /> </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">9:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Cho x - 3 ≤ y - 3, so sánh x và y. Chọnđápánđúngnhất?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. x &lt; y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. x = y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. x &gt; y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">&nbsp;D.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> x ≤ y</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">10:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Cho x - 5 ≤ y - 5. So sánh x và y?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. x &lt; y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. x = y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. x &gt; y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">D.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> x ≤ y</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">11:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Cho a &gt; b khiđó</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">. a - b &gt; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. a - b &lt; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. a - b = 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;D. a - b ≤ 0</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">12:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Hai phươngtrìnhtươngđươnglàhaiphươngtrìnhcó</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. ­Mộtnghiệmgiốngnhau&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. Hai nghiệmgiốngnhau</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">&nbsp;C.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Tậpnghiệmgiốngnhau&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. Tậpnghiệmkhácnhau</span></span></span></span></span>

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			<td style="width:234px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">PHÒNG GD THANH OAI</span></span><br />
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			<td style="width:409px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>ĐỀ KIỂM TRA CUỐI HỌC KÌ II</b></span></span><br />
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			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><i>Thời gian làm bài: </i><i>6</i><b><i>0 phút</i></b></span></span></td>
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt">Đề 2</span></b></span></span><br />
<br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:black">Câu 1:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:black">Phântíchđathức 8x<sup>3</sup>&nbsp;+ 12x<sup>2</sup>y + 6xy<sup>2</sup>&nbsp;+ y<sup>3</sup>&nbsp;thànhnhântử ta được</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">A. (x + 2y)<sup>3</sup></span></span><span style="font-size:14.0pt"><span style="color:red"> B.</span></span><span style="font-size:14.0pt"><span style="color:black"> (2x + y)<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. (2x – y)<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. (8x + y)<sup>3</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:black">Câu 2:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:black">Chọncâu&nbsp;<b>sai.</b></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">A. x<sup>2</sup>&nbsp;– 6x + 9 = (x – 3)<sup>2</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 4x<sup>2</sup>&nbsp;– 4xy + y<sup>2</sup>&nbsp;= (2x – y)<sup>2</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">C.&nbsp;<img alt="Trắc nghiệm Phân tích đa thức thành nhân tử bằng phương pháp dùng hằng đẳng thức có đáp án" id="Picture_x0020_14" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image001.png" style="width:116.25pt; height:35.25pt" /> </span></span><span style="font-size:14.0pt"><span style="color:red"> D</span></span><span style="font-size:14.0pt"><span style="color:black">. -x<sup>2</sup>&nbsp;– 2xy – y<sup>2</sup>&nbsp;= -(x – y)<sup>2</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">3:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Cho m bấtkỳ, chọncâu&nbsp;<b>đúng</b>?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">. m - 3 &gt; m – 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. m - 3 &lt; m - 4</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">C. m - 3 = m – 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. Cả A, B, C đềusai</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">4:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Biếtrằng m &gt; n với m, n bấtkỳ, chọncâu&nbsp;<b>đúng</b>?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> m - 3 &gt; n – 3&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;B. m - 3 &lt; n - 3</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">C. m - 3 = n - 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. Cả A, B, C đềusai</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">5:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Cho biết a &lt; b. Trongcáckhẳngđịnhsau, sốkhẳngđịnh&nbsp;<b>sai&nbsp;</b>là?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">(I) a - 1 &lt; b – 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (II) a - 1 &lt; b&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (III) a + 2 &lt; b + 2</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">D.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> 0</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:.25in 148.5pt 274.5pt 418.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">Câu</span></span></span></b><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">6:</span></span></span></b>&nbsp;<span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">Phương trình nào sau đây là phương trình bậc nhất một ẩn?</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>A.</b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1031" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image002.wmz" style="width:69pt; height:17.25pt" /> </span></span></span>;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b> 4y – 8x = 0;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">C.</span></b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:14.0pt"><img alt="" id="_x0000_i1032" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image003.wmz" style="width:63pt; height:36pt" /> </span></span></span>;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:13.0pt"><img alt="" id="_x0000_i1033" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image004.wmz" style="width:57.75pt; height:35.25pt" /> </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">7:</span></span></b>&nbsp;<span lang="FR" style="font-size:14.0pt">Trongcácphươngtrìnhsau, phươngtrìnhnàokhôngcómộtnghiệmduynhất ?</span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">A. 8 + x = 4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 2 – x = x – 4.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">&nbsp;C.</span> 1 + x = x.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. 5 + 2x = 0.</span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">Câu</span></span></span></b><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">8:&nbsp;</span></span></span></b><span style="font-size:14.0pt"><span style="line-height:115%">Điềukiệnxácđịnhcủaphươngtrìnhcủaphươngtrình<span style="position:relative"><span style="top:16.0pt"><img alt="" id="Picture_x0020_16" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image005.wmz" style="width:141.75pt; height:35.25pt" /> </span></span>là:</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">A.x</span><i><span style="font-size:14.0pt"><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">≠</span></span></i><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image006.png" style="width:10.5pt; height:16.5pt" /> </span></span></span></span><span style="font-size:14.0pt"> 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">B.</span> x </span><i><span style="font-size:14.0pt"><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">≠ ±</span></span></i><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image007.png" style="width:27.75pt; height:16.5pt" /> </span></span></span></span><span style="font-size:14.0pt">1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. x </span><i><span style="font-size:14.0pt"><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">≠ -1</span></span></i><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image008.png" style="width:36pt; height:16.5pt" /> </span></span></span></span><span style="font-size:14.0pt">&nbsp; D. x </span><i><span style="font-size:14.0pt"><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">≠0</span></span></i><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image009.png" style="width:21.75pt; height:16.5pt" /> </span></span></span></span><span style="font-size:14.0pt">&nbsp;và <span style="position:relative"><span style="top:3.0pt"><img alt="" id="Picture_x0020_17" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image010.wmz" style="width:33.75pt; height:14.25pt" /> </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">9:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Cho x - 3 ≤ y - 3, so sánh x và y. Chọnđápánđúngnhất?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. x &lt; y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. x = y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. x &gt; y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">&nbsp;D.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> x ≤ y</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">10:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Cho x - 5 ≤ y - 5. So sánh x và y?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. x &lt; y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. x = y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. x &gt; y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">D.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> x ≤ y</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">11:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Cho a &gt; b khiđó</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">. a - b &gt; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. a - b &lt; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. a - b = 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. a - b ≤ 0</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">12:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Hai phươngtrìnhtươngđươnglàhaiphươngtrìnhcó</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. ­Mộtnghiệmgiốngnhau&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. Hai nghiệmgiốngnhau</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">&nbsp;C.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Tậpnghiệmgiốngnhau&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. Tậpnghiệmkhácnhau</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">Câu</span></span></span></b><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">8:&nbsp;</span></span></span></b><span style="font-size:14.0pt"><span style="line-height:115%">Điềukiệnxácđịnhcủaphươngtrìnhcủaphươngtrình<span style="position:relative"><span style="top:16.0pt"><img alt="" id="Picture_x0020_49" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image005.wmz" style="width:141.75pt; height:35.25pt" /> </span></span>là:</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">A.x</span><i><span style="font-size:14.0pt"><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">≠</span></span></i><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image006.png" style="width:10.5pt; height:16.5pt" /> </span></span></span></span><span style="font-size:14.0pt"> 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">B.</span> x </span><i><span style="font-size:14.0pt"><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">≠ ±</span></span></i><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image007.png" style="width:27.75pt; height:16.5pt" /> </span></span></span></span><span style="font-size:14.0pt">1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. x </span><i><span style="font-size:14.0pt"><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">≠ -1</span></span></i><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image008.png" style="width:36pt; height:16.5pt" /> </span></span></span></span><span style="font-size:14.0pt">&nbsp; D. x </span><i><span style="font-size:14.0pt"><span style="font-family:&#039;Cambria Math&#039;,&#039;serif&#039;">≠0</span></span></i><span style="font-size:12.0pt"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1025" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image009.png" style="width:21.75pt; height:16.5pt" /> </span></span></span></span><span style="font-size:14.0pt">&nbsp;và <span style="position:relative"><span style="top:3.0pt"><img alt="" id="Picture_x0020_47" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image010.wmz" style="width:33.75pt; height:14.25pt" /> </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">9:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Cho x - 3 ≤ y - 3, so sánh x và y. Chọnđápánđúngnhất?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. x &lt; y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. x = y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. x &gt; y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">&nbsp;D.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> x ≤ y</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">10:</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">&nbsp;Cho x - 5 ≤ y - 5. So sánh x và y?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. x &lt; y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. x = y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;C. x &gt; y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">D.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> x ≤ y</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">11:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Cho a &gt; b khiđó</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">. a - b &gt; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. a - b &lt; 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. a - b = 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. a - b ≤ 0</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">12:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Hai phươngtrìnhtươngđươnglàhaiphươngtrìnhcó</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. ­Mộtnghiệmgiốngnhau&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. Hai nghiệmgiốngnhau</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">&nbsp;C.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Tậpnghiệmgiốngnhau&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. Tậpnghiệmkhácnhau</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">13:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Số&nbsp;<img alt="Trắc nghiệm Diện tích hình chữ nhật có đáp án" id="Picture_x0020_3" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image011.png" style="width:9pt; height:34.5pt" /> &nbsp;lànghiệmcủaphươngtrìnhnàodướiđây?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. x - 1 =&nbsp;<img alt="Trắc nghiệm Diện tích hình chữ nhật có đáp án" id="Picture_x0020_1" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image011.png" style="width:9pt; height:34.5pt" /> </span></span><span style="font-size:14.0pt"><span style="color:red"> B. </span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">4x<sup>2</sup>&nbsp;– 1 = 0&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;C. x<sup>2</sup>&nbsp;+ 1 = 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. 2x – 1 = 3</span></span></span></span></span><br />
<br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">14:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Chọnkhẳngđịnh&nbsp;<b>đúng</b></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A. </span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">3 lànghiệmcủaphươngtrình x<sup>2</sup>&nbsp;– 9 = 0</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">B. {3} làtậpnghiệmcủaphươngtrình x<sup>2</sup>&nbsp;– 9 = 0</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">C. Tậpnghiệmcủaphươngtrình (x + 3)(x – 3) = x<sup>2</sup>&nbsp;– 9 là Q</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">D. x = 2 lànghiệmduynhấtcủaphươngtrình x<sup>2</sup>&nbsp;– 4 = 0</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:.25in 148.5pt 274.5pt 418.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="color:rgb(51, 51, 51);">Câu 15:</span></span></span></b><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">Nếu </span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1034" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image012.wmz" style="width:30.75pt; height:15pt" /> </span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">&nbsp;thì: </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>A.</b></span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:6.0pt"><img alt="" id="_x0000_i1035" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image013.wmz" style="width:45.75pt; height:18pt" /> </span></span></span><span style="font-size:14.0pt">;&nbsp;&nbsp; </span><b><span lang="NL" style="font-size:14.0pt"><span style="color:red">B.</span></span></b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:6.0pt"><img alt="" id="_x0000_i1036" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image014.wmz" style="width:69pt; height:18pt" /> </span></span></span><span style="font-size:14.0pt">;&nbsp;&nbsp; </span><b><span lang="NL" style="font-size:14.0pt">C.</span></b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:6.0pt"><img alt="" id="_x0000_i1037" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image015.wmz" style="width:71.25pt; height:18pt" /> </span></span></span><span style="font-size:14.0pt">;&nbsp;&nbsp; </span><b><span lang="NL" style="font-size:14.0pt">D.</span></b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1038" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image016.wmz" style="width:69pt; height:15pt" /> </span></span></span><span style="font-size:14.0pt">.</span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">16:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Phươngtrìnhnàosauđâyvônghiệm?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. x – 1 = 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">B</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">. 4x<sup>2</sup>&nbsp;+ 1 = 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. x<sup>2</sup>&nbsp;– 3 = 6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. x<sup>2</sup>&nbsp;+ 6x = -9</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">17:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Phươngtrìnhnàosauđâyvônghiệm?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. 2x – 1 = 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. -x<sup>2</sup>&nbsp;+ 4 = 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">C. </span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">x<sup>2</sup>&nbsp;+ 3 = -6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. 4x<sup>2</sup>&nbsp;+4x = -1</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">18:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Tậpnghiệmcủaphươngtrình 3x – 6 = x – 2 là</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">&nbsp;A.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> S = {2}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. S = {-2}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. S = {4}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. S = Ø</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">19:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Phươngtrình&nbsp;<img alt="Trắc nghiệm Mở đầu về phương trình có đáp án" id="Picture_x0020_4" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image017.png" style="width:70.5pt; height:36pt" /> &nbsp;cótậpnghiệmlà</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. S = {±4}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">B.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> S = {±2}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. S = {2}&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. S = {4}</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">20:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Có bao nhiêunghiệmcủaphươngtrình |x + 3| = 7?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">&nbsp;A.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. 4</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">21:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Phươngtrình |2x – 5| = 1 cónghiệmlà:</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">&nbsp;A.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> x = 3; x = 2B. x =&nbsp;<img alt="Bài tập ôn tập Chương 4 Đại số 8 có đáp án" id="Picture_x0020_12" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image018.png" style="width:9.75pt; height:33pt" /> ; x = 2</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">C. x = 1; x = 2D. x = 0,5; x = 1,5</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu</span></span></b><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">22:&nbsp;</span></span></b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Hìnhvẽdướiđâylàbiểudiễntậpnghiệmcủabấtphươngtìnhnào?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"><img alt="Bài tập ôn tập Chương 4 Đại số 8 có đáp án" id="Picture_x0020_13" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image019.png" style="width:256.5pt; height:57.75pt" /> </span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">A. x – 1 ≥ 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. x + 1 ≤ 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">&nbsp;C.</span></span><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);"> x + 3 &lt; 9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. x + 1 &gt; 7</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:rgb(51, 51, 51);">Câu 23:</span></span></b>Tậpnghiệmcủaphươngtrình<span style="font-size:14.0pt"><span style="position:relative"><span style="top:8.0pt"><img alt="" id="_x0000_i1039" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image020.wmz" style="width:110.25pt; height:23.25pt" /> </span></span></span>là</span></span>

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			<td style="width:168px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="color:red">&nbsp; A</span>. <span style="font-size:14.0pt"><span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1040" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image021.wmz" style="width:54.75pt; height:21pt" /> </span></span></span></span></span></td>
			<td style="width:168px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">B. <span style="font-size:14.0pt"><span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1041" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image022.wmz" style="width:54.75pt; height:21pt" /> </span></span></span></span></span></td>
			<td style="width:168px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">C. <span style="font-size:14.0pt"><span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1042" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image023.wmz" style="width:1in; height:21pt" /> </span></span></span></span></span></td>
			<td style="width:168px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">D. <span style="font-size:14.0pt"><span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1043" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image024.wmz" style="width:81.75pt; height:21pt" /> </span></span></span></span></span></td>
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<span style="font-size:12pt"><span style="line-height:105%"><span style="tab-stops:.25in"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="line-height:105%"><span style="color:rgb(51, 51, 51);">Câu 24:</span></span></span></b><span style="line-height:105%">Tậphợpnghiệmcủaphươngtrình</span><span style="font-size:14.0pt"><span style="line-height:105%"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1044" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image025.wmz" style="width:57.75pt; height:17.25pt" /> </span></span></span></span><span style="line-height:105%">là:</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A.<span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1045" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image026.wmz" style="width:21.75pt; height:21pt" /> </span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">B</span>. <span style="font-size:14.0pt"><span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1046" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image027.wmz" style="width:30.75pt; height:21pt" /> </span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;C. <span style="font-size:14.0pt"><span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1047" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image028.wmz" style="width:18.75pt; height:21pt" /> </span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;D. <span style="font-size:14.0pt"><span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1048" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image029.wmz" style="width:27.75pt; height:21pt" /> </span></span></span></span></span></span><br />
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<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:.25in 148.5pt 274.5pt 418.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">Câu 25:</span></span></b><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%"> Trong các phương trình sau phương trình nào tương đương với phương trình: </span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1049" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image030.wmz" style="width:59.25pt; height:15pt" /> </span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">?</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="NL" style="font-size:14.0pt"><span style="color:red">A.</span></span></b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1050" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image031.wmz" style="width:51.75pt; height:15pt" /> </span></span></span><span lang="NL" style="font-size:14.0pt">&nbsp; <b>B.</b></span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1051" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image032.wmz" style="width:59.25pt; height:15pt" /> </span></span></span><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C.</b></span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:6.0pt"><img alt="" id="_x0000_i1052" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image033.wmz" style="width:68.25pt; height:18pt" /> </span></span></span><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D.</b></span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1053" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image034.wmz" style="width:59.25pt; height:15pt" /> </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="PL" style="font-size:14.0pt">Câu 26:</span></b><span lang="PL" style="font-size:14.0pt"> Phương trình nào sau đây là phương trình bậc nhất một ẩn ?</span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">A. 0x + 2 = 0.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B.</span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:13.0pt"><img alt="" id="_x0000_i1054" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image035.wmz" style="width:39.75pt; height:35.25pt" /> </span></span></span><span lang="FR" style="font-size:14.0pt"> C. x + y = 0.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">D.</span> 2x + 1 = 0</span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:.25in 148.5pt 274.5pt 418.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">Câu 27:</span></span></b><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%"> Điều kiện xác định của phương trình </span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="position:relative"><span style="top:14.0pt"><img alt="" id="_x0000_i1055" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image036.wmz" style="width:90pt; height:36pt" /> </span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">&nbsp;là:</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:.25in 148.5pt 274.5pt 418.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">A.</span></span></b><span style="font-size:14.0pt"><span style="line-height:115%"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1056" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image037.wmz" style="width:39.75pt; height:15pt" /> </span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B.</b></span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="position:relative"><span style="top:13.0pt"><img alt="" id="_x0000_i1057" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image038.wmz" style="width:35.25pt; height:35.25pt" /> </span></span></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="NL" style="font-size:14.0pt">C.</span></b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1058" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image039.wmz" style="width:39.75pt; height:15pt" /> </span></span></span><span lang="NL" style="font-size:14.0pt">&nbsp;hoặc </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:13.0pt"><img alt="" id="_x0000_i1059" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image040.wmz" style="width:35.25pt; height:35.25pt" /> </span></span></span><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; <b><span style="color:red">D.</span></b></span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1060" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image041.wmz" style="width:39.75pt; height:15pt" /> </span></span></span><span lang="NL" style="font-size:14.0pt">&nbsp;và </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:13.0pt"><img alt="" id="_x0000_i1061" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image042.wmz" style="width:35.25pt; height:35.25pt" /> </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt">Câu 28:</span></b><span style="font-size:14.0pt"> Cho phươngtrình</span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:13.0pt"><img alt="" id="_x0000_i1062" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image043.wmz" style="width:92.25pt; height:35.25pt" /> </span></span></span><span style="font-size:14.0pt">. Điềukiệnxácđịnhcủaphươngtrìnhlà:</span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="IT" style="font-size:14.0pt">A.&nbsp;&nbsp; x</span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:2.0pt"><img alt="" id="_x0000_i1063" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image044.wmz" style="width:12pt; height:12pt" /> </span></span></span><span lang="IT" style="font-size:14.0pt">1;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B.&nbsp; x</span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:2.0pt"><img alt="" id="_x0000_i1064" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image045.wmz" style="width:12pt; height:12pt" /> </span></span></span><span lang="IT" style="font-size:14.0pt">-1;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">&nbsp;&nbsp;&nbsp;C.</span>&nbsp; x</span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:2.0pt"><img alt="" id="_x0000_i1065" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image046.wmz" style="width:27.75pt; height:14.25pt" /> </span></span></span><span style="font-size:14.0pt">;</span><span lang="IT" style="font-size:14.0pt"> D.&nbsp; x</span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:2.0pt"><img alt="" id="_x0000_i1066" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image047.wmz" style="width:12pt; height:12pt" /> </span></span></span><span lang="IT" style="font-size:14.0pt">0&nbsp; và x</span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:2.0pt"><img alt="" id="_x0000_i1067" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image048.wmz" style="width:12pt; height:12pt" /> </span></span></span><span style="font-size:14.0pt">1.</span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:.25in 148.5pt 274.5pt 418.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">Câu 29:</span></span></b><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%"> Nếu </span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1068" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image012.wmz" style="width:30.75pt; height:15pt" /> </span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">&nbsp;thì: </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="NL" style="font-size:14.0pt">A.</span></b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:6.0pt"><img alt="" id="_x0000_i1069" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image013.wmz" style="width:45.75pt; height:18pt" /> </span></span></span><span style="font-size:14.0pt">;&nbsp;&nbsp; </span><b><span lang="NL" style="font-size:14.0pt"><span style="color:red">B.</span></span></b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:6.0pt"><img alt="" id="_x0000_i1070" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image014.wmz" style="width:69pt; height:18pt" /> </span></span></span><span style="font-size:14.0pt">;&nbsp;&nbsp; </span><b><span lang="NL" style="font-size:14.0pt">C.</span></b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:6.0pt"><img alt="" id="_x0000_i1071" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image015.wmz" style="width:71.25pt; height:18pt" /> </span></span></span><span style="font-size:14.0pt">;&nbsp;&nbsp; </span><b><span lang="NL" style="font-size:14.0pt">D.</span></b><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1072" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image016.wmz" style="width:69pt; height:15pt" /> </span></span></span><span style="font-size:14.0pt">.</span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="line-height:115%">Câu 30:</span></span></b><span style="font-size:14.0pt"><span style="line-height:115%"> Cho – 2a+1&lt; -2b +1. Khẳngđịnhnàosauđâyluônđúng.</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%">A.a&lt; b&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">&nbsp; B</span>.a&gt; b&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C.a=b&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. –a&gt; -b</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:0in 152.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="PT-BR" style="font-size:14.0pt"><span style="line-height:115%">Câu 31: </span></span></b><span lang="PT-BR" style="font-size:14.0pt"><span style="line-height:115%">Nếu </span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1073" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image049.wmz" style="width:30.75pt; height:15pt" /> </span></span></span></span><span lang="PT-BR" style="font-size:14.0pt"><span style="line-height:115%">&nbsp;thì </span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1074" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image050.wmz" style="width:42.75pt; height:15pt" /> </span></span></span></span><span lang="PT-BR" style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:Webdings">c</span></span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1075" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image051.wmz" style="width:42.75pt; height:15pt" /> </span></span></span></span><span lang="PT-BR" style="font-size:14.0pt"><span style="line-height:115%">. Dấu thích hợp trong ô trống là:</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">A. &lt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. &gt;<span style="color:red"> C</span>. </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:2.0pt"><img alt="" id="_x0000_i1076" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image052.wmz" style="width:11.25pt; height:12.75pt" /> </span></span></span><span lang="PT-BR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;D. </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:2.0pt"><img alt="" id="_x0000_i1077" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image053.wmz" style="width:11.25pt; height:12.75pt" /> </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="FR" style="font-size:14.0pt">Câu 32&nbsp;</span></b><span lang="FR" style="font-size:14.0pt">: Bấtphươngtrình</span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="Picture_x0020_5" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image054.wmz" style="width:64.5pt; height:12.75pt" /> </span></span></span><span lang="FR" style="font-size:14.0pt">cótậpnghiệm là </span></span></span>

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			<td style="width:166px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A. </span></span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:8.0pt"><img alt="" id="_x0000_i1078" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image055.wmz" style="width:53.25pt; height:21.75pt" /> </span></span></span></span></span></td>
			<td style="width:166px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">B. </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:8.0pt"><img alt="" id="_x0000_i1079" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image056.wmz" style="width:53.25pt; height:21.75pt" /> </span></span></span></span></span></td>
			<td style="width:166px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">C.</span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:8.0pt"><img alt="" id="_x0000_i1080" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image057.wmz" style="width:54pt; height:21.75pt" /> </span></span></span></span></span></td>
			<td style="width:166px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">D.</span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:8.0pt"><img alt="" id="_x0000_i1081" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image058.wmz" style="width:53.25pt; height:21.75pt" /> </span></span></span></span></span></td>
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<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="line-height:115%">Câu 33: </span></span></b><span style="font-size:14.0pt"><span style="line-height:115%">Với<span style="position:relative"><span style="top:12.0pt"><img alt="" id="Picture_x0020_55" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image059.wmz" style="width:29.25pt; height:30.75pt" /> </span></span>lànghiệmcủabấtphươngtrìnhnàotrongcácbấtphươngtrìnhsau:</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A</span></span><span style="font-size:14.0pt">.12x &gt; 2- x&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B.<span style="position:relative"><span style="top:12.0pt"><img alt="" id="Picture_x0020_54" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image060.wmz" style="width:42.75pt; height:30.75pt" /> </span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C.<span style="position:relative"><span style="top:12.0pt"><img alt="" id="Picture_x0020_53" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image061.wmz" style="width:56.25pt; height:30.75pt" /> </span></span>D.3x+5 &gt; 6 +x</span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="line-height:115%">Câu 34:</span></span></b><span style="font-size:14.0pt"><span style="line-height:115%">Hìnhvẽdướiđâybiểudiễntậpnghiệmcủabấtphươngtrìnhnào</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><img alt="" id="Picture_x0020_74" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image062.emz" style="position:absolute; margin-left:173px; margin-top:14px; width:176.25pt; height:38.25pt; z-index:-3" /> </span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:center 243.0pt right 6.75in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:2.0pt"><img alt="" id="Picture_x0020_52" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image063.wmz" style="width:9pt; height:14.25pt" /> </span></span></span></span></span></span></span></span><br />
<br />
<span style="font-size:12pt"><span style="background:white"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">A.x&gt; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B.x&lt; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c) <span style="position:relative"><span style="top:3.0pt"><img alt="" id="Picture_x0020_51" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image064.wmz" style="width:27.75pt; height:14.25pt" /> </span></span><span style="color:red">d) </span><span style="position:relative"><span style="top:3.0pt"><img alt="" id="Picture_x0020_50" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image065.wmz" style="width:27.75pt; height:14.25pt" /> </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:black">Câu 35: </span></span></b><span lang="VI" style="font-size:14.0pt"><span style="color:black">Hình thoi có hai đường chéo là </span></span><span style="font-size:14.0pt"><span style="color:black">10 cm</span></span><span lang="PT-BR" style="font-size:14.0pt"><span style="color:black"> và </span></span><span style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1082" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image066.wmz" style="width:29.25pt; height:15.75pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">. Một tứ giác có các đỉnh là trung điểm của các cạnh hình thoi. Diện tích của tứ giác đó là</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:10.0pt 135.0pt 260.0pt 385.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp; <b>A. </b></span></span><span style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1083" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image067.wmz" style="width:36.75pt; height:18.75pt" /> </span></span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span lang="VI" style="font-size:14.0pt"><span style="color:red">B</span></span></b><b><span lang="VI" style="font-size:14.0pt"><span style="color:black">.</span></span></b><span style="font-size:14.0pt"><span style="color:black">30 cm<sup>2</sup></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span lang="VI" style="font-size:14.0pt"><span style="color:red">C. </span></span></b><span style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1084" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image068.wmz" style="width:37.5pt; height:18.75pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D. </b></span></span><span style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1085" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image069.wmz" style="width:37.5pt; height:18.75pt" /> </span></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="FR" style="font-size:14.0pt"><span style="color:black">Câu36:</span></span></b><span lang="VI" style="font-size:14.0pt"><span style="color:black">Cho tam giác </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1086" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image070.wmz" style="width:28.5pt; height:13.5pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;có </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1087" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image071.wmz" style="width:26.25pt; height:15.75pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;lần lượt nằm trên hai cạnh </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1088" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image072.wmz" style="width:42pt; height:15.75pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;sao cho </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:2.0pt"><img alt="" id="_x0000_i1089" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image073.wmz" style="width:21.75pt; height:12.75pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;song song với </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1090" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image074.wmz" style="width:20.25pt; height:13.5pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;và </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1091" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image075.wmz" style="width:53.25pt; height:13.5pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">, </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1092" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image076.wmz" style="width:54pt; height:13.5pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">,</span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black">BC = 9</span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">. Khi đó độ dài </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:2.0pt"><img alt="" id="_x0000_i1093" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image077.wmz" style="width:21.75pt; height:12.75pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;bằng</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:10.0pt 135.0pt 260.0pt 385.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="VI" style="font-size:14.0pt"><span style="color:red">A.</span></span></b><span lang="ES" style="font-size:14.0pt"><span style="color:black">3 cm</span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>B. </b></span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1094" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image078.wmz" style="width:25.5pt; height:13.5pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C. </b></span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:12.0pt"><img alt="" id="_x0000_i1095" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image079.wmz" style="width:28.5pt; height:30.75pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D. </b></span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:12.0pt"><img alt="" id="_x0000_i1096" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image080.wmz" style="width:34.5pt; height:30.75pt" /> </span></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="VI" style="font-size:14.0pt"><span style="color:black">Câu </span></span></b><b><span style="font-size:14.0pt"><span style="color:black">37</span></span></b><b><span lang="VI" style="font-size:14.0pt"><span style="color:black">: </span></span></b><span lang="PT-BR" style="font-size:14.0pt"><span style="color:black">Diện tích hình thoi có độ dài hai đường chéo bằng </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black">12</span></span><span lang="PT-BR" style="font-size:14.0pt"><span style="color:black"> và </span></span><span lang="FR" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1097" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image081.wmz" style="width:30.75pt; height:15.75pt" /> </span></span></span></span><span lang="PT-BR" style="font-size:14.0pt"><span style="color:black">&nbsp;là</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:10.0pt 135.0pt 260.0pt 385.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp; <b>A. </b></span></span><span lang="FR" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1098" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image082.wmz" style="width:43.5pt; height:18.75pt" /> </span></span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b><span lang="VI" style="font-size:14.0pt"><span style="color:red">B.</span></span></b><span lang="FR" style="font-size:14.0pt"><span style="color:black">60 cm<sup>2</sup></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>C</b>. </span></span><span style="font-size:14.0pt"><span style="color:black">1</span></span><span lang="FR" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1099" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image083.wmz" style="width:37.5pt; height:18.75pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>D. </b></span></span><span lang="FR" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1100" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image084.wmz" style="width:37.5pt; height:18.75pt" /> </span></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="PT-BR" style="font-size:14.0pt"><span style="color:black">&nbsp;Câu 38:</span></span></b><span lang="VI" style="font-size:14.0pt"><span style="color:black">Cho </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1101" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image085.wmz" style="width:33.75pt; height:14.25pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">đồng dạng với </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1102" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image086.wmz" style="width:39pt; height:14.25pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">Biết </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:12.0pt"><img alt="" id="_x0000_i1103" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image087.wmz" style="width:45pt; height:30.75pt" /> </span></span></span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black">và</span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black"> diện tích tam giác </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1104" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image088.wmz" style="width:30.75pt; height:13.5pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;là </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1105" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image089.wmz" style="width:39pt; height:18pt" /> </span></span></span></span><span lang="VI" style="font-size:14.0pt"><span style="color:black">&nbsp;Khi đó diện tích tam giác </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1106" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image090.wmz" style="width:28.5pt; height:13.5pt" /> </span></span></span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black">bằng</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:10.0pt 135.0pt 260.0pt 385.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; <span lang="FR" style="font-size:14.0pt"><span style="color:red">A.</span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1107" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image091.wmz" style="width:30pt; height:18pt" /> </span></span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="FR" style="font-size:14.0pt"><span style="color:red">B.</span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1108" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image092.wmz" style="width:33pt; height:18pt" /> </span></span></span></span><span lang="FR" style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1109" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image093.wmz" style="width:44.25pt; height:18pt" /> </span></span></span></span><span lang="FR" style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. </span></span><span lang="ES" style="font-size:14.0pt"><span style="color:black"><span style="position:relative"><span style="top:5.0pt"><img alt="" id="_x0000_i1110" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image094.wmz" style="width:45pt; height:18pt" /> </span></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="color:black">Câu 39:</span></span></b><span style="font-size:14.0pt">Rútgọnbiểuthức<span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1111" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image095.wmz" style="width:105pt; height:21pt" /> </span></span>khi<span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1112" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image096.wmz" style="width:30.75pt; height:15pt" /> </span></span>ta được A bằng</span></span></span>

<table class="Table" style="width:693px; border-collapse:collapse" width="693">
	<tbody>
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			<td style="width:173px; padding:0in 7px 0in 7px; height:24px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt"><span style="color:red">&nbsp;A.</span></span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1113" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image097.wmz" style="width:38.25pt; height:15pt" /> </span></span></span><span lang="FR" style="font-size:14.0pt">.</span></span></span></td>
			<td style="width:173px; padding:0in 7px 0in 7px; height:24px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">B. </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:2.0pt"><img alt="" id="_x0000_i1114" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image098.wmz" style="width:42.75pt; height:14.25pt" /> </span></span></span><span lang="FR" style="font-size:14.0pt">.</span></span></span></td>
			<td style="width:173px; padding:0in 7px 0in 7px; height:24px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">C. </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1115" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image099.wmz" style="width:42.75pt; height:15pt" /> </span></span></span><span lang="PT-BR" style="font-size:14.0pt">.</span></span></span></td>
			<td style="width:173px; padding:0in 7px 0in 7px; height:24px" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">D. </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" id="_x0000_i1116" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image100.wmz" style="width:38.25pt; height:15pt" /> </span></span></span><span lang="PT-BR" style="font-size:14.0pt">.</span></span></span></td>
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<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:.25in 148.5pt 274.5pt 418.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><span style="line-height:115%">Câu 40:</span></span></b><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">Tập nghiệm của phương trình </span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1117" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image101.wmz" style="width:62.25pt; height:21pt" /> </span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="line-height:115%">:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">A. </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1118" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image102.wmz" style="width:41.25pt; height:21pt" /> </span></span></span><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp; B.&nbsp; </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1119" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image103.wmz" style="width:50.25pt; height:21pt" /> </span></span></span><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="color:red">C. </span></span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1120" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image104.wmz" style="width:56.25pt; height:21pt" /> </span></span></span><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D<b>.</b></span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:7.0pt"><img alt="" id="_x0000_i1121" o:ole="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image105.wmz" style="width:63.75pt; height:21pt" /> </span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Câu 41: <span style="color:black">Chọncâu&nbsp;</span></span><strong><span style="font-size:14.0pt"><span style="color:black">đúng.</span></span></strong></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">&nbsp;&nbsp;&nbsp; A.</span></span><span style="font-size:14.0pt"><span style="color:black"> (A + B)<sup>3</sup>&nbsp;= A<sup>3</sup>&nbsp;+ 3A<sup>2</sup>B + 3AB<sup>2</sup>&nbsp;+ B<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. (A - B)<sup>3</sup>&nbsp;= A<sup>3</sup>&nbsp;- 3A<sup>2</sup>B - 3AB<sup>2</sup>&nbsp;- B<sup>3</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. (A + B)<sup>3</sup>&nbsp;= A<sup>3</sup>&nbsp;+ B<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. (A - B)<sup>3</sup>&nbsp;= A<sup>3</sup>&nbsp;- B<sup>3</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">Câu 42: Chọncâu&nbsp;</span></span><strong><span style="font-size:14.0pt"><span style="color:black">đúng.&nbsp;</span></span></strong><span style="font-size:14.0pt"><span style="color:black">(x – 2y)<sup>3</sup>&nbsp;bằng</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">A. x<sup>3</sup>&nbsp;– 3xy + 3x<sup>2</sup>y + y<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span style="font-size:14.0pt"><span style="color:red">B.</span></span><span style="font-size:14.0pt"><span style="color:black"> x<sup>3</sup>&nbsp;– 6x<sup>2</sup>y + 12xy<sup>2</sup>&nbsp;– 8y<sup>3</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">C. x<sup>3</sup>&nbsp;– 6x<sup>2</sup>y + 12xy<sup>2</sup>&nbsp;– 4y<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;D. x<sup>3</sup>&nbsp;– 3x<sup>2</sup>y + 12xy<sup>2</sup>&nbsp;– 8y<sup>3</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">Câu 43:</span></span><strong>&nbsp;</strong><span style="font-size:14.0pt"><span style="color:black">Chọncâu&nbsp;</span></span><strong><span style="font-size:14.0pt"><span style="color:black">sai.</span></span></strong></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A. A<sup>3</sup>&nbsp;+ B<sup>3</sup>&nbsp;= (A + B)(A<sup>2</sup>&nbsp;– AB + B<sup>2</sup>)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. A<sup>3</sup>&nbsp;- B<sup>3</sup>&nbsp;= (A - B)(A<sup>2</sup>&nbsp;+ AB + B<sup>2</sup>)</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. (A + B)<sup>3</sup>&nbsp;= (B + A)<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">D.</span></span><span style="font-size:14.0pt"><span style="color:black"> (A – B)<sup>3</sup>&nbsp;= (B – A)<sup>3</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">Câu 44:</span></span><strong>&nbsp;</strong><span style="font-size:14.0pt"><span style="color:black">Viếtbiểuthức 8x<sup>3</sup>&nbsp;+ 36x<sup>2</sup>&nbsp;+ 54x + 27 dướidạnglậpphươngcủamộttổng</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A. (2x + 9)<sup>3</sup></span></span><span style="font-size:14.0pt"><span style="color:red"> B.</span></span><span style="font-size:14.0pt"><span style="color:black"> (2x + 3)<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. (4x + 3)<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. (4x + 9)<sup>3</sup></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">Câu 45:</span></span><strong>&nbsp;</strong><span style="font-size:14.0pt"><span style="color:black">Viếtbiểuthức (x – 3y)(x<sup>2</sup>&nbsp;+ 3xy + 9y<sup>2</sup>) dướidạnghiệuhailậpphương</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A. x<sup>3</sup>&nbsp;+ (3y)<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. x<sup>3</sup>&nbsp;+ (9y)<sup>3</sup></span></span><span style="font-size:14.0pt"><span style="color:red">C.</span></span><span style="font-size:14.0pt"><span style="color:black"> x<sup>3</sup>&nbsp;– (3y)<sup>3</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. x<sup>3</sup>&nbsp;– (9y)<sup>3</sup></span></span></span></span></span><br />
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<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">Câu 46: Phântíchđathức x<sup>3</sup>&nbsp;+ 12x thànhnhântử ta được</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A. x<sup>2</sup>(x + 12)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">B.</span></span><span style="font-size:14.0pt"><span style="color:black"> x(x<sup>2</sup>&nbsp;+ 12)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. x(x<sup>2</sup>&nbsp;– 12)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. x<sup>2</sup>(x – 12)</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">Câu 47: Phântíchđathức mx + my + m thànhnhântử ta được</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A</span></span><span style="font-size:14.0pt"><span style="color:black">. m(x + y + 1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. m(x + y + m)</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">C. m(x + y)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. m(x + y – 1)</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">Câu 48: Đẳngthứcnàosauđâylàđúng</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">A. 4x<sup>3</sup>y<sup>2</sup>&nbsp;– 8x<sup>2</sup>y<sup>3</sup>&nbsp;= 4x<sup>2</sup>y(xy – 2y<sup>2</sup>)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 4x<sup>3</sup>y<sup>2</sup>&nbsp;– 8x<sup>2</sup>y<sup>3</sup>&nbsp;= 4x<sup>2</sup>y<sup>2</sup>(x – y)</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">C. </span></span><span style="font-size:14.0pt"><span style="color:black">4x<sup>3</sup>y<sup>2</sup>&nbsp;– 8x<sup>2</sup>y<sup>3</sup>&nbsp;= 4x<sup>2</sup>y<sup>2</sup>(x – 2y)&nbsp;&nbsp; </span></span><span style="font-size:14.0pt"><span style="color:red">D.</span></span><span style="font-size:14.0pt"><span style="color:black"> 4x<sup>3</sup>y<sup>2</sup>&nbsp;– 8x<sup>2</sup>y<sup>3</sup>&nbsp;= 4x<sup>2</sup>y<sup>2</sup>(x – 2y)</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">Câu 49: </span></span><strong>&nbsp;</strong><span style="font-size:14.0pt"><span style="color:black">Phântícđathức 3x(x – 3y) + 9y(3y – x) thànhnhântử ta được</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A. </span></span><span style="font-size:14.0pt"><span style="color:black">3(x – 3y)<sup>2</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. (x – 3y)(3x + 9y)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">C. (x – 3y) + (3 – 9y)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. (x – 3y) + (3x – 9y)</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:black">Câu 50: Mẫuthứcchungcủacácphânthức&nbsp;<img alt="Trắc nghiệm Quy đồng mẫu thức nhiều phân thức có đáp án" id="Picture_x0020_6" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image106.png" style="width:77.25pt; height:32.25pt" /> &nbsp;là?</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:18.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="color:red">A.</span></span><span style="font-size:14.0pt"><span style="color:black">x(x<sup>2</sup>&nbsp;- 1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;B. x(x - 1)<sup>2</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. x<sup>2</sup>&nbsp;– 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. x(x - 1)</span></span></span></span></span><br />
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