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Question

Simplify:
(a+b+c)×(a+bc)


A

a2+b2+c2+2ab

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B

a2+b2c2+2ab

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C

a2+b2c22ab

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D

a2b2c2+2ab

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Solution

The correct option is B

a2+b2c2+2ab


(a+b+c)×(a+bc)

=[(a+b)+c]×[(a+b)c]=(a+b)2c2
[Using identity (a+b)(ab)=a2b2]

=a2+b2+2abc2
=a2+b2c2+2ab


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