prove that....

check

http://www.targetiit.com/iit-jee-forum/posts/quad-14741.html

2) let the roos be p/q and r/s

then the quadratic become s

(x-p/q)(x-r/s)=0

comparing this with ax2+bx+c we get

qs=a -(ps+rq)=b and pr=c

this means q,s should be odd because their product is an odd integer a.

even p,r should be odd in a similar way

this mean s ps+rq will be evn .. but this is equal to -b whihc is an even integer..

hence a contradictoon..