作业帮计算xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜求当a=-4,b=-3,c=1时，代数式3a²b-[2a²b-(2abc-a²c)-4a²c]-abc的值
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 17:47:23
![计算xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜求当a=-4,b=-3,c=1时，代数式3a²b-[2a²b-(2abc-a²c)-4a²c]-abc的值](/uploads/image/z/4034919-39-9.jpg?t=%E8%AE%A1%E7%AE%97xy-%EF%BD%9B2%E5%88%86%E4%B9%8B1x%26%23178%3B-%5B3y%26%23178%3B-%282x%2B3y%29%5D-1%EF%B9%9C%E6%B1%82%E5%BD%93a%3D-4%2Cb%3D-3%2Cc%3D1%E6%97%B6%EF%BC%8C%E4%BB%A3%E6%95%B0%E5%BC%8F3a%26%23178%3Bb-%5B2a%26%23178%3Bb-%282abc-a%26%23178%3Bc%29-4a%26%23178%3Bc%5D-abc%E7%9A%84%E5%80%BC)
计算xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜求当a=-4,b=-3,c=1时，代数式3a²b-[2a²b-(2abc-a²c)-4a²c]-abc的值
计算xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜
求当a=-4,b=-3,c=1时，代数式3a²b-[2a²b-(2abc-a²c)-4a²c]-abc的值
计算xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜求当a=-4,b=-3,c=1时，代数式3a²b-[2a²b-(2abc-a²c)-4a²c]-abc的值
xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜
=xy-｛2分之1x²-[3y²-2x-3y]-1﹜
=xy-｛2分之1x²-3y²+2x+3y-1﹜
=xy-2分之1x²-3y²-2x-3y+1
xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜
=xy-[2分之1x²-(3y²-2x-3y)-1]
=xy-(2分之1x²-3y²+2x+3y-1)
=xy-2分之1x²+3y²-2x-3y+1