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<div data-v-a7c68f28=""><span data-v-a7c68f28="">Hướng dẫn Giải Luyện tập - Vận dụng 2 (Trang 65 SGK Toán 7, Bộ Cánh diều, Tập 2)</span></div>
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<p><strong>Luyện tập - Vận dụng 2 (Trang 65 SGK Toán 7, Bộ Cánh diều, Tập 2)</strong></p>
<p>Tính:</p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mrow><mfrac><mn>1</mn><mn>2</mn></mfrac><msup><mi>x</mi><mn>4</mn></msup><mo> </mo><mo>-</mo><mo> </mo><mfrac><mn>1</mn><mn>4</mn></mfrac><msup><mi>x</mi><mn>3</mn></msup><mo> </mo><mo>+</mo><mo> </mo><mi>x</mi></mrow></mfenced><mo> </mo><mo>:</mo><mfenced><mrow><mo> </mo><mo>-</mo><mfrac><mn>1</mn><mn>8</mn></mfrac><mi>x</mi></mrow></mfenced></math></p>
<p> </p>
<p><em><span style="text-decoration: underline;"><strong>Hướng dẫn giải</strong></span></em></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced><mrow><mfrac><mn>1</mn><mn>2</mn></mfrac><msup><mi>x</mi><mn>4</mn></msup><mo> </mo><mo>-</mo><mo> </mo><mfrac><mn>1</mn><mn>4</mn></mfrac><msup><mi>x</mi><mn>3</mn></msup><mo> </mo><mo>+</mo><mo> </mo><mi>x</mi></mrow></mfenced><mo> </mo><mo>:</mo><mfenced><mrow><mo> </mo><mo>-</mo><mfrac><mn>1</mn><mn>8</mn></mfrac><mi>x</mi></mrow></mfenced></math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>=</mo><mo> </mo><mfrac><mn>1</mn><mn>2</mn></mfrac><msup><mi>x</mi><mn>4</mn></msup><mo> </mo><mo>:</mo><mo> </mo><mfenced><mrow><mo>-</mo><mfrac><mn>1</mn><mn>8</mn></mfrac><mi>x</mi></mrow></mfenced><mo> </mo><mo>-</mo><mo> </mo><mfrac><mn>1</mn><mn>4</mn></mfrac><msup><mi>x</mi><mn>3</mn></msup><mo> </mo><mo>:</mo><mo> </mo><mfenced><mrow><mo>-</mo><mfrac><mn>1</mn><mn>8</mn></mfrac><mi>x</mi></mrow></mfenced><mo> </mo><mo>+</mo><mo> </mo><mi>x</mi><mo> </mo><mo>:</mo><mo> </mo><mfenced><mrow><mo>-</mo><mfrac><mn>1</mn><mn>8</mn></mfrac><mi>x</mi></mrow></mfenced></math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>=</mo><mfenced><mrow><mfrac><mn>1</mn><mn>2</mn></mfrac><mo> </mo><mo>:</mo><mo> </mo><mfrac><mrow><mo>-</mo><mn>1</mn></mrow><mn>8</mn></mfrac></mrow></mfenced><mfenced><mrow><mo> </mo><msup><mi>x</mi><mn>4</mn></msup><mo>:</mo><mi>x</mi></mrow></mfenced><mo> </mo><mo>-</mo><mo> </mo><mfenced><mrow><mfrac><mn>1</mn><mn>4</mn></mfrac><mo> </mo><mo>:</mo><mo> </mo><mfrac><mrow><mo>-</mo><mn>1</mn></mrow><mn>8</mn></mfrac></mrow></mfenced><mo> </mo><mo>.</mo><mfenced><mrow><mo> </mo><msup><mi>x</mi><mn>3</mn></msup><mo> </mo><mo>:</mo><mo> </mo><mi>x</mi></mrow></mfenced><mo> </mo><mo>+</mo><mo> </mo><mfenced><mrow><mn>1</mn><mo> </mo><mo>:</mo><mo> </mo><mfrac><mrow><mo>-</mo><mn>1</mn></mrow><mn>8</mn></mfrac></mrow></mfenced><mo> </mo><mo>.</mo><mo> </mo><mfenced><mrow><mi>x</mi><mo> </mo><mo>:</mo><mo> </mo><mi>x</mi></mrow></mfenced></math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>=</mo><mfrac><mrow><mo>-</mo><mn>8</mn></mrow><mn>2</mn></mfrac><msup><mi>x</mi><mn>3</mn></msup><mo> </mo><mo>-</mo><mo> </mo><mfrac><mrow><mo>-</mo><mn>8</mn></mrow><mn>4</mn></mfrac><msup><mi>x</mi><mn>2</mn></msup><mo> </mo><mo>+</mo><mo> </mo><mo>(</mo><mo>-</mo><mn>8</mn><mo>)</mo></math></p>
<p><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>=</mo><mo> </mo><mo>-</mo><msup><mn>4</mn><mn>3</mn></msup><mo> </mo><mo>+</mo><mo> </mo><mn>2</mn><msup><mi>x</mi><mn>2</mn></msup><mo> </mo><mo>-</mo><mo> </mo><mn>8</mn></math></p>