a(x-2)-b(x-2)+(2-x) 因式分解

问题描述:

a(x-2)-b(x-2)+(2-x) 因式分解

a(x-2)-b(x-2)+(2-x)
=a(x-2)-b(x-2)-(x-2)
=(a-b-1)(x-2)