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Question

(2a+3b)2=


A

4a2+9b2+12ab

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B

4a3+9b2+12ab

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C

4a2+9b2+36ab

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D

4a2+9b3+12ab

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Solution

The correct option is A

4a2+9b2+12ab


Using the identity (a+b)2=a2+b2+2ab, we get,

(2a+3b)2=(2a)2+(3b)2+2×2a×3b

=4a2+9b2+12ab


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