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Question

Verify the identity (a+b)2=a2+2ab+b2 for a=2,b=4

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Solution

taking a=2,b=4

(a+b)2=(2+4)2=62=36

a2+b2+2ab=22+42+2×2×4=4+16+16=36

(a+b)2=a2+b2+2ab

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