分解因式:(1)x2(x-y)+y2(y-x);(2)(x+y)2+64-16(x+y).

问题描述:

分解因式:
(1)x2(x-y)+y2(y-x);
(2)(x+y)2+64-16(x+y).

(1)x2(x-y)+y2(y-x)
=(x-y)(x2-y2
=(x-y)2(x+y);
(2)(x+y)2+64-16(x+y)=(x+y-8)2