因式分解 a(1-b)^2-1+2b-b^2
问题描述:
因式分解 a(1-b)^2-1+2b-b^2
答
a(1-b)^2-1+2b-b^2
=a(1-b)^2-(1-2b+b^2)
=a(1-b)^2-(1-b)^2
=(1-b)^2(a-1)