(x-y)的五次方÷(y-x)的三次方

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(x-y)的五次方÷(y-x)的三次方

(x-y)的五次方÷(y-x)的三次方
=-(x-y)的五次方÷(x-y)的三次方
=-(x-y)²

=-(x-y)^2
=-x^2+2xy-y^2

-(x-y)²

原式=(x-y)5/[-(x-y)]3
=(x-y)5/-(x-y)3
=-(x-y)2