Question

（x-y）²-（y-x）⁴因式分解

（x-y）²-（y-x）⁴因式分解！！
答得好，会加分。

Answer 1

(x-y)²-(y-x)^4
=(x-y)²-(x-y)^4
=(x-y)²[1-(x-y)²]
=(x-y)²(1-x+y)(1+x-y)

Answer 2

(x+y)(x-y)(1-x+y)(1+x-y)

追问

过程？？