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Question

(a+b)(a2+b2ab) =


A

(a)3(b)3

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B

(a+b)3

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C

(ab)3

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D

(a)3+(b)3

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Solution

The correct option is D

(a)3+(b)3


The given expression is
(a+b)(a2+b2ab)

Expanding we get,

a3+ab2a2b+a2b+b3ab2=a3+b3

Hence,
(a+b)(a2+b2ab) = a3+b3


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