1. Let π₯, π¦ β Z. Prove that (π₯ + 1)π¦^2 is even if and only if π₯ is odd or π¦ is even. β¨
** please write formal proof**
1. Let 𝑥, 𝑦 β Z. Prove that (𝑥 + 1)𝑦^2 is even if and only if 𝑥 is odd or ү
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answerhappygod
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1. Let 𝑥, 𝑦 β Z. Prove that (𝑥 + 1)𝑦^2 is even if and only if 𝑥 is odd or ү
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