Find the value (a+b) ^ 2 ( a-b)^2.. Question also mentioned above...solve it as fast you can ..
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(a+b)^2 + (a-b)^2
= (a^2 + b^2 +2ab) + (a^2 + b^2 - 2ab)
= a^2 + b^2 + 2ab + a^2 + b^2 - 2ab
= 2a^2 + 2b^2
= 2(a+b)^2
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