怎样分解2x^+3xy-2y^-x+8y-6

问题描述:

怎样分解2x^+3xy-2y^-x+8y-6

两次十字相乘
2x^+3xy-2y^-x+8y-6
=(2x-y)(x+2y)+(-x+8y)-6
=[(2x-y)+3][(x+2y)-2]
=(2x-y+3)(x+2y-2)