2x^+xy-y^-4x+5y-6=?

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/17 06:05:47
2x^+xy-y^-4x+5y-6=?

2x^+xy-y^-4x+5y-6=?
2x^+xy-y^-4x+5y-6=?

2x^+xy-y^-4x+5y-6=?
原式=(2x-y)(x+y)-4x+5y-6 =(2x-y)(x+y)+(2x+2y)-6x+3y-6 =(2x-y)(x+y)+2(x+y)-6x+3y-6 =(x+y)(2x-y+2)-3(2x-y+2) =(x+y-3)(2x-y+2)