Question

1、(x-y)的8次方÷(y-x)3次方=

Answer 1

1、(x-y)⁸÷(y-x)³=(x-y)⁸/[-(x-y)³]=-(x-y)⁵

2、(x-y)⁴÷(y-x)³+(x-y)º×(y-x)+(-x-y)⁷÷(x+7)⁶

=(x-y)⁴/[-(x-y)³]+(y-x)-(x+y)⁷/(x+y)⁶

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