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Question

a + b = 5, ab = 3 হলে a³ + b³ = কত?

65

70

75

80

ANSWER : 4

Descrption

<p><math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi>a</mi><mn>3</mn></msup><mo>+</mo><msup><mi>b</mi><mn>3</mn></msup><mo>&nbsp;</mo><mo>=</mo><mo>&nbsp;</mo><msup><mrow><mo>(</mo><mi>a</mi><mo>+</mo><mi>b</mi><mo>)</mo></mrow><mn>3</mn></msup><mo>&nbsp;</mo><mo>-</mo><mn>3</mn><mi>a</mi><mi>b</mi><mo>(</mo><mi>a</mi><mo>+</mo><mi>b</mi><mo>)</mo><mspace linebreak="newline">&nbsp;</mspace><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>=</mo><msup><mn>5</mn><mn>3</mn></msup><mo>-</mo><mn>3</mn><mo>×</mo><mn>3</mn><mo>×</mo><mn>5</mn><mspace linebreak="newline">&nbsp;</mspace><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>=</mo><mo>&nbsp;</mo><mn>125</mn><mo>-</mo><mn>45</mn><mo>&nbsp;</mo><mo>=</mo><mo>&nbsp;</mo><mn mathvariant="bold">80</mn><mo mathvariant="bold">&nbsp;</mo><mo mathvariant="bold">(</mo><mi mathvariant="bold-italic">A</mi><mi mathvariant="bold-italic">n</mi><mi mathvariant="bold-italic">s</mi><mo mathvariant="bold">)</mo></math></p>

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