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

分类: 作业答案 • 2021-12-19 19:48:46

问题描述：

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