(x+y)(x²-xy+y²)—xy(x+y)因式分解

问题描述:

(x+y)(x²-xy+y²)—xy(x+y)因式分解
(x-y)²+5(x-y)+6
(x²-4x)²-3(x²-4x)-28
-2x²y+6xy+56y
因式分解

(x+y)(x²-xy+y²)—xy(x+y)
=(x+y)(x²-xy+y²-xy)
=(x+y)(x²-2xy+y²)
=(x+y)(x-y)²(x-y)²+5(x-y)+6(x²-4x)²-3(x²-4x)-28-2x²y+6xy+56y 因式分解新的问题,先采纳,再直接求助,答题不易,谢谢。。