Let nεZ,Prove that 1-n^2>0, then 3n-2 is an even integer. 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?