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