(2x-y)^2-7(2x-y)-18怎么因式分解啊?速求!

问题描述:

(2x-y)^2-7(2x-y)-18怎么因式分解啊?速求!

(2x-y)^2-7(2x-y)-18
=(2x-y-9)(2x-y+2)