x^2-5x(y-1)-6(1-y)^2
问题描述：
x^2-5x(y-1)-6(1-y)^2
分解因式
答
解
x²-5x(y-1)-6(1-y)²
=x²-5x(y-1)-6(y-1)²——将y-1看成一个整体
=[x-6(y-1)][x+(y-1)]
=(x-6y+6)(x+y-1)