一般的二次三项式的分解:x^2-2xy+y^2-x+y-6

问题描述:

一般的二次三项式的分解:x^2-2xy+y^2-x+y-6

x^2-2xy+y^2-x+y-6
=(x^2-2xy+y^2)-(x-y)-6
=(x-y)^2-(x-y)-6
=(x-y+2)(x-y-3)