来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/23 19:05:24
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
x²-xy+3y-3x
=x(x-y)-3(x-y)
=(x-y)(x-3)
2x²+xy-y²-4x+5y-6
=(2x-y)(x+y)-4x+5y-6
=(2x-y+2)(x+y-3)
再问: 第二题能更详细点吗?
再答: 2x²+xy-y²-4x+5y-6 =(2x-y)(x+y)-4x+5y-6 =(2x-y+2)(x+y-3) 两个十字相乘法: 2x -y ╳ x y 2x-y 2 ╳ x+y 3
再答: 呵呵