Show that (a+b)^2 + (a-b)^2 = 2(a^2+b^2).
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Show that (a+b)^2 + (a-b)^2 = 2(a^2+b^2).
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=>Here,2ab and -2ab gets cancelled.
=>Here,2 comes two times along with a and b so,take 2 as common.
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