分解因式:3m(x-y)3+27m3(y-x).
问题描述:
分解因式:3m(x-y)3+27m3(y-x).
答
原式=3m(x-y)3-27m3(x-y)=3m(x-y)[(x-y)2-9m2]=3m(x-y)(x-y+3m)(x-y-3m).
分解因式:3m(x-y)3+27m3(y-x).
原式=3m(x-y)3-27m3(x-y)=3m(x-y)[(x-y)2-9m2]=3m(x-y)(x-y+3m)(x-y-3m).