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Question

If (a+b)2=a2+2ab+b2 then what is the value of a2+b2


A

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

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B

a2+b2=(a+b)22ab

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C

a2+b2=(ab)22ab

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D

a2+b2=3(a+b)2

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Solution

The correct option is B

a2+b2=(a+b)22ab


We know that,

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

a2+b2=(a+b)22ab


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