(y-x)的二次方(x-y)+(x-y)的三次方+2(x-y)的二次方(y-x)在线等,秒回答案已有,求大神讲解

Question

(y-x)的二次方(x-y)+(x-y)的三次方+2(x-y)的二次方(y-x)在线等,秒回
答案已有,求大神讲解

Answer 1

(y-x)²(x-y)+(x-y)³+2(x-y)²(y-x)
=(x-y)²(x-y)+(x-y)³-2(x-y)²(x-y)
=(x-y)³+(x-y)³-2(x-y)³
=2(x-y)³-2(x-y)³
=0