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Question
The minimum value of 2x2 +8x -5 is
-9
13/2
-13
13
None of them
ANSWER : 3
Descrption
<pre><math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>2</mn><msup><mi>x</mi><mn>2</mn></msup><mo> + </mo><mn>8</mn><mi>x</mi><mo> - </mo><mn>5</mn><mo> = </mo><mn>2</mn><mo>(</mo><msup><mi>x</mi><mn>2</mn></msup><mo> + </mo><mn>2</mn><mo>.</mo><mi>x</mi><mo>.</mo><mn>2</mn><mo> + </mo><msup><mn>2</mn><mn>2</mn></msup><mo>)</mo><mo> - </mo><mn>8</mn><mo> - </mo><mn>5</mn><mo> = </mo><mn>2</mn><mo>(</mo><mi>x</mi><mo> + </mo><mn>2</mn><msup><mo>)</mo><mrow><msup><mrow/><mn>2</mn></msup><mo> - </mo><mn>13</mn></mrow></msup></math> যখন X + 2 = 0,তখন <math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>2</mn><msup><mi>x</mi><mn>2</mn></msup><mo> + </mo><mn>8</mn><mi>x</mi><mo> - </mo><mn>5</mn></math> এর value সবনিন্ম, যা - 13 </pre>
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