(x-1)²分之3减去(x-1)²分之3x等于多少?

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(x-1)²分之3减去(x-1)²分之3x等于多少?

(x-1)²分之3减去(x-1)²分之3x等于多少?
(x-1)²分之3减去(x-1)²分之3x等于多少?

(x-1)²分之3减去(x-1)²分之3x等于多少?
3/(x-1)^2-3x/(x-1)^2
=3/(x-1)^2*(1-x)
=3/(1-x)