计算(y-x)²(x-y)+(x-y)³+2(x-y)²乘(y-x)帮帮我啊,撒
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计算(y-x)²(x-y)+(x-y)³+2(x-y)²乘(y-x)帮帮我啊,撒
计算(y-x)²(x-y)+(x-y)³+2(x-y)²乘(y-x)帮帮我啊,撒
计算(y-x)²(x-y)+(x-y)³+2(x-y)²乘(y-x)帮帮我啊,撒
(y-x)^2.(x-y)+(x-y)^3+2(x-y)^2.(y-x)
=(x-y)^3+(x-y)^3-2(x-y)^3
=0