(x-y)^2+5(x-y)-14
问题描述:
(x-y)^2+5(x-y)-14
答
(x-y)^2+5(x-y)-14
=(x-y+7)(x-y-2)
(x-y)^2+5(x-y)-14
(x-y)^2+5(x-y)-14
=(x-y+7)(x-y-2)