(a-b)(b-c)(c-a)^2/(b-a)^2(a-c)(c-b)约分

问题描述:

(a-b)(b-c)(c-a)^2/(b-a)^2(a-c)(c-b)约分

(a-b)(b-c)(c-a)²/(b-a)²(a-c)(c-b)
=(a-b)(b-c)(a-c)²/(a-b)²(a-c)[-(b-c)]
=-(a-c)/(a-b)