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Question

Simplify :
(a−b)2+4ab


A

a2 + b2

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B

(a+b)2

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C

a2 - b2

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D

a2b2+4ab

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Solution

The correct option is B

(a+b)2


To Simplify : (ab)2+4ab

Using the identity,
(ab)2 = a22ab+b2

So,
(ab)2+4ab=a22ab+b2+4ab
=a2+2ab+b2=(a+b)2(a+b)2=a2+2ab+b2

Hence,
(ab)2+4ab=(a+b)2


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