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Question

x²+4y² +8x - 16y+16 এর সাথে কত যোগ করলে যোগফল পূর্ণবর্গ হবে?

4xy

- 2xy

- 4xy

-6xy

ANSWER : 3

Descrption

<p><math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mrow><mo>(</mo><mi>a</mi><mo>+</mo><mi>b</mi><mo>+</mo><mi>C</mi><mo>)</mo></mrow><mrow><mn>2</mn><mo>&nbsp;</mo></mrow></msup><mo>&nbsp;</mo><mo>=</mo><mo>&nbsp;</mo><msup><mi>a</mi><mn>2</mn></msup><mo>+</mo><msup><mi>b</mi><mn>2</mn></msup><mo>+</mo><mo>&nbsp;</mo><msup><mi>c</mi><mn>2</mn></msup><mo>+</mo><mn>2</mn><mi>a</mi><mi>b</mi><mo>+</mo><mn>2</mn><mi>b</mi><mi>c</mi><mo>+</mo><mn>2</mn><mi>c</mi><mi>a</mi><mspace linebreak="newline">&nbsp;</mspace><mspace linebreak="newline">&nbsp;</mspace><mpadded lspace="+1px"><msup><mi>x</mi><mn>2</mn></msup></mpadded><mo>+</mo><mn>4</mn><msup><mi>y</mi><mn>2</mn></msup><mo>+</mo><mn>8</mn><mi>x</mi><mo>-</mo><mn>16</mn><mi>y</mi><mo>+</mo><mn>16</mn><mspace linebreak="newline">&nbsp;</mspace><mo>=</mo><msup><mi>x</mi><mn>2</mn></msup><mo>+</mo><mo>&nbsp;</mo><mn>16</mn><mo>+</mo><mn>4</mn><msup><mi>y</mi><mn>2</mn></msup><mo>+</mo><mn>8</mn><mi>x</mi><mo>-</mo><mn>16</mn><mi>y</mi><mspace linebreak="newline">&nbsp;</mspace><mo>=</mo><mo>&nbsp;</mo><msup><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow><mn>2</mn></msup><mo>+</mo><mo>&nbsp;</mo><msup><mrow><mo>(</mo><mn>4</mn><mo>)</mo></mrow><mn>2</mn></msup><mo>+</mo><msup><mrow><mo>(</mo><mo>-</mo><mn>2</mn><mi>y</mi><mo>)</mo></mrow><mn>2</mn></msup><mo>+</mo><mo>&nbsp;</mo><mn>2</mn><mo>.</mo><mi>x</mi><mo>.</mo><mn>4</mn><mo>+</mo><mn>2</mn><mo>.</mo><mo>(</mo><mo>-</mo><mn>2</mn><mi>y</mi><mo>)</mo><mo>.</mo><mn>4</mn><mo>+</mo><mn>2</mn><mo>.</mo><mo>(</mo><mo>-</mo><mn>2</mn><mi>y</mi><mo>)</mo><mo>.</mo><mi>x</mi><mspace linebreak="newline">&nbsp;</mspace><mo>=</mo><mo>&nbsp;</mo><msup><mrow><mo>(</mo><mi>x</mi><mo>+</mo><mn>4</mn><mo>-</mo><mn>2</mn><mi>y</mi><mo>)</mo></mrow><mn>2</mn></msup></math>তাই -4xy যোগ করতে হবে</p>

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