将(x-2y)^2-8(x-2y)(x+y)+16(x+y)^2分解因式

问题描述:

将(x-2y)^2-8(x-2y)(x+y)+16(x+y)^2分解因式
RT

(x-2y)^2-8(x-2y)(x+y)+16(x+y)^2 = [(x-2y) - 4(x+y)]^2 = 9(x+2y)^2