
帮帮忙:一道分解因式的题:
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x^2*(1-y)-2x(1-y)^2-(y-1)^3
=x^2*(1-y)-2x(1-y)^2+(1-y)^3
=(1-y)(x^2-2x(1-y)+(1-y)^2)
=(1-y)(x-1+y)^2
=x^2*(1-y)-2x(1-y)^2+(1-y)^3
=(1-y)(x^2-2x(1-y)+(1-y)^2)
=(1-y)(x-1+y)^2
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