因式分解:2x^2-xy-3y^2-6x+14y-8
问题描述:
因式分解:2x^2-xy-3y^2-6x+14y-8
RT,写写解题的步骤和思路……
答
原式=2x^2-xy-3y^2 -8x+112y +2x+2y -8
=(x+y)(2x-3y)-4(2x-3y)+2(x+y)-8
=(x+y-4)(2x-3y+2)