计算：①-x·(y-x)³·(x-y)的四次方 ②(x-y)²·(y-x)³·（x-y）的4次方
人气：119 ℃ 时间：2019-10-11 16:12:04
解答
①-x·(y-x)³·(x-y)4
=(-x)·[-(x -y)³·(x-y)4
=x· (x –y)³+4
= x· (x –y)7
②(x-y)²·(y-x)³·（x-y）4
=-(x-y)²+3+4
=-(x-y)9
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