若(x+5)(x-7)=x2+mx+n,则m=_,n=_.

问题描述:

若(x+5)(x-7)=x2+mx+n,则m=______,n=______.

(x+5)(x-7)=x2-2x-35=x2+mx+n,
则m=-2,n=-35.
故答案为:-2,-35.