(x -y)³ + (y-x)^4
问题描述:
(x -y)³ + (y-x)^4
答
-(y-x)^3-(y-x)^4=-(y-x)(1-y+x)
答
(x -y)³ + (y-x)^4
=(x-y)^3+(x-y)^4
=(x-y)^3(1+x-y)
=(x-y)(x^2-xy+y^2)(1+x-y)
不知道这样够不够啊?还要详细么?