x²(x+y)(y-x)-xy(x+y)(x-y)x²(x+y)(y-x)-xy(x+y)(x-y)

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x²(x+y)(y-x)-xy(x+y)(x-y)x²(x+y)(y-x)-xy(x+y)(x-y)

x²(x+y)(y-x)-xy(x+y)(x-y)x²(x+y)(y-x)-xy(x+y)(x-y)
x²(x+y)(y-x)-xy(x+y)(x-y)
x²(x+y)(y-x)-xy(x+y)(x-y)

x²(x+y)(y-x)-xy(x+y)(x-y)x²(x+y)(y-x)-xy(x+y)(x-y)
x²(x+y)(y-x)-xy(x+y)(x-y)
=x²(y+x)(y-x)+xy(y+x)(y-x)
=(x²+xy)(y+x)(y-x)
=x(x+y)(y+x)(y-x)
=x(x+y)²(y-x)

是因式分解嘛?
答案是x(x+y)^2(y-x)

化简还是干嘛