(a) Let x and y be integers. Prove that (x + y)2 is even if and only if x and y are of
Chapter 3, Problem 3.32(choose chapter or problem)
(a) Let x and y be integers. Prove that (x + y)2 is even if and only if x and y are of the same parity.(b) Restate the result in (a) in terms of odd integers.
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