2(1-x)^2+6a(x-1)^3分解因式
问题描述：
2(1-x)^2+6a(x-1)^3分解因式
答
2(1-x)^2+6a(x-1)^3
=2(x-1)^2+6a(x-1)^3
=2(x-1)²[1+3a(x-1)]
=2(x-1)²(3ax-3a+1)