leogomxz3192 leogomxz3192

21-08-2019
Mathematics

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

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LammettHash LammettHash

21-08-2019

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

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