Let nεZ,Prove that 1-n^2>0, then 3n-2 is an even integer.(adsbygoogle = window.adsbygoogle || []).push({});

I proved it like this. I think its right but im not able to word it correctly.

Since 1-n^2>0 therefore n=0. Then 3n-6=3(0)-2=-2. Since 0 is an integer, 3n-6 is even.

How can I learn to word this correctly because im having some trouble with it?

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# Direct proofs help

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