-2(x-y)^3+12(y-x)^2-18x+18y

分类: 作业答案 • 2022-06-18 08:44:04

问题描述：

答

-2(x-y)^3+12(y-x)^2-18x+18y
=-2[(x-y)^3-6(x-y)^2+9(x-y)]
=-2(x-y)[(x-y)^2-6(x-y)+9]
=-2(x-y)(x-y-3)^2=-2(x-y)[(x-y)^2-6(x-y)+9]=-2(x-y)(x-y-3)^2