先去括号,在合并同类项
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 12:37:12
![先去括号,在合并同类项](/uploads/image/z/769278-30-8.jpg?t=%E5%85%88%E5%8E%BB%E6%8B%AC%E5%8F%B7%2C%E5%9C%A8%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9)
先去括号,在合并同类项
先去括号,在合并同类项
先去括号,在合并同类项
=x-1-2x-1 =-x-2
=3x-6+2-4x =-x-4
=4b-6a+6a-9b =-5b
=3x^2-xy-2y^2-2x^2-2xy+4y^2
=x^2-3xy+2y^2
=(x-2y)(x-y)
(1) X-1-2X-1=-X-2
(2)3X-6+2-4X=-X-4
(3)4B-6A+6A-9B=-5b
(4)3x^2-xy-2y^2-2x^-2xy+4y^2=x^2-3xy+2y^2