(x-y)²×(y-x)³=

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(x-y)²×(y-x)³=

(x-y)²×(y-x)³=
(x-y)²×(y-x)³=

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

(x-y)²·(y-x)³
=(y-x)²·(y-x)³
=(y-x)^(2+3)
=(y-x)^5

(x-y)²×(y-x)³
=(x-y)²×(-(x-y))³
=(x-y)²×(-(x-y)³)
= -(x-y)^5