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Question
x + y = 8 , x - y = 6 হলে ,
x
2
+
y
2
- এর মান -
40
60
50
80
ANSWER : 3
Descrption
<math xmlns = "http://www.w3.org/1998/Math/MathML"><msup><mi>x</mi><mn>2</mn></msup><mo> + </mo><msup><mi>y</mi><mn>2</mn></msup><mo> = </mo><mfrac><mn>1</mn><mn>2</mn></mfrac><mo>{</mo><mo>(</mo><mi>x</mi><mo> + </mo><mi>y</mi><msup><mo>)</mo><mn>2</mn></msup><mo> + </mo><mo>(</mo><mi>x</mi><mo> - </mo><mi>y</mi><msup><mo>)</mo><mn>2</mn></msup><mo>}</mo><mo> = </mo><mfrac><mn>1</mn><mn>2</mn></mfrac><mo>{</mo><mo>(</mo><msup><mn>8</mn><mn>2</mn></msup><mo> + </mo><msup><mn>6</mn><mn>2</mn></msup><mo>)</mo><mo>}</mo><mspace linebreak = "newline"/><mo> = </mo><mfrac><mn>1</mn><mn>2</mn></mfrac><mo> </mo><mo>×</mo><mn>100</mn><mo> = </mo><mn>50</mn></math>
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