分解因式x^2-xy-2y^2+3x+3y-3
问题描述：
分解因式x^2-xy-2y^2+3x+3y-3
答
x²-xy-2y²+3x+3y-3=(x-2y)(x+y)+3(x+y)-3=(x-2y+3)(x+y)-3
分解因式x^2-xy-2y^2+3x+3y-3
x²-xy-2y²+3x+3y-3=(x-2y)(x+y)+3(x+y)-3=(x-2y+3)(x+y)-3