Theorem: The positive primitive solutions of with y even are , where r and s are arbitrary integers of opposite parity with r>s>0 and gcd(r,s)=1.
Using this theorem, find all solutions of the equation
(hint: write the equation in the form )
I am not sure how to do this problem. I don't even understand how to get the equation in the hint.
I hope someone can help me out. Thank you!
[also under discussion in math links forum]