a^2(x-1)^2+4a(1-x)分解质因式
问题描述：
a^2(x-1)^2+4a(1-x)分解质因式
答
原式=a²(x-1)²-4a(x-1)
=a(x-1)[a(x-1)-4]
=a(x-1)(ax-a-4)