(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
(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
答案已有,求大神讲解
赞 huangdangui 春芽
共回答了14个问题采纳率：71.4% 举报
(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
=(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
1年前 追问
1
2(x-y)²(y-x)=2(x-y)²[-(x-y)]=-2(x-y)²(x-y) 把-号提到前面就行。
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你能帮帮他们吗