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Non-rational Quadratic (Posted on 2010-08-22) Difficulty: 2 of 5
Prove that the quadratic equation ax2 + bx + c = 0
does not have a rational root if a, b, and c are odd integers.

See The Solution Submitted by Bractals    
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Solution Mod 4 | Comment 2 of 5 |

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
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