6x²+xy-2y²+2x-8y-8 求：x的值 y的值

6x²+xy-2y²+2x-8y-8 求：x的值 y的值
6x²+xy-2y²+2x-8y-8 求：x的值 y的值

6x²+xy-2y²+2x-8y-8 求：x的值 y的值
6x²+xy-2y²+2x-8y-8=0
(3x+2y)(2x-y)+2x-8y-8=0
(3x+2y+4)(2x-y-2)=0
3x+2y+4=0
2x-y-2=0
解得：x=0
y=-2

6x^2+xy-2y^2+2x-8y-8
=(2x-y)(3x+2y)+2(x-4y)-8
=(2x-y-2)(3x+2y+4)