Question: I need help with the following question: Prove that for integers a and b, (a 3)b2 is even if and only if a is odd

I need help with the following question: Prove that for integers

I need help with the following question:

a and b, (a 3)b2 is even if and only if a

Prove that for integers a and b, (a 3)b2 is even if and only if a is odd or b is even

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