(1-x）³(x-1)²-(x-1)^4[-(1-x)]解出来

(1-x）³(x-1)²-(x-1)^4[-(1-x)]
解出来

(1-x）³(x-1)²-(x-1)^4[-(1-x)]
=-(x-1)³(x-1)²+(x-1)^4(x-1)
=-(x-1)^5+(x-1)^5
=0;
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