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Question

Given a b = a^2 + 2ab + b^2, what is the value of a b when a = 4 and b = 6?

Accepted Answer

Note that a b = a^2 + 2ab + b^2 = (a + b)^2. Thus, 4 6 = (4 + 6)^2 = 10^2 = 100.