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Prove: If a^2-a is even then a is even.

Prove: If a^2-a is even then a is even.
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Prove: If a^2-a is even then a is even.

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User Jeprubio
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8.2k points

1 Answer

3 votes

This is not always true. Consider
a=3. Then
3^2-3=9-3=6 is even, but
a is odd.

answered
User AgDude
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8.1k points
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