作业帮已知A=6x²-4x-2,B=-2x²+5,C=2x-3,求（A+B）-[2A-(C-3B)]
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/05 14:59:07
![已知A=6x²-4x-2,B=-2x²+5,C=2x-3,求（A+B）-[2A-(C-3B)]](/uploads/image/z/1269351-63-1.jpg?t=%E5%B7%B2%E7%9F%A5A%3D6x%26%23178%3B-4x-2%2CB%3D-2x%26%23178%3B%2B5%2CC%3D2x-3%2C%E6%B1%82%EF%BC%88A%2BB%EF%BC%89-%5B2A-%28C-3B%29%5D)
x){}K m*Ԕ
-uM*ttluڦ:ζF:66~OnfMR>U/pjdQEE P\X 64Մ4 J5@چ&PI]Vm
]CC<; oR
已知A=6x²-4x-2,B=-2x²+5,C=2x-3,求（A+B）-[2A-(C-3B)]
已知A=6x²-4x-2,B=-2x²+5,C=2x-3,求（A+B）-[2A-(C-3B)]
已知A=6x²-4x-2,B=-2x²+5,C=2x-3,求（A+B）-[2A-(C-3B)]
（A+B）-[2A-(C-3B)]
=(6x²-4x-2-2x²+5)-(12x^2-8x-4-2x+3-6x^2+15)
=4X^2-4x+3-(6x^2-10x+14)
=-2x^2+6x-11