Prove that the quadratic equation ax² + bx + c = 0
does not have a rational root if a, b, and c are odd integers.

I am not postihg my solution, which is homomorphic with SH's ,

except my way was  treating the discriminant b^2-4*a*c

mod 4, and not mod 8.    Same result, of course.

Posted by Ady TZIDON on 2010-08-23 02:38:00