作业帮化简求值 3x²y-[2xy-2(xy-2/3x²y)]+x²y²,其中x=3,y=-1/3
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/05 15:53:28
![化简求值 3x²y-[2xy-2(xy-2/3x²y)]+x²y²,其中x=3,y=-1/3](/uploads/image/z/695963-11-3.jpg?t=%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC+3x%26%23178%3By-%5B2xy-2%28xy-2%2F3x%26%23178%3By%29%5D%2Bx%26%23178%3By%26%23178%3B%2C%E5%85%B6%E4%B8%ADx%3D3%2Cy%3D-1%2F3)
化简求值 3x²y-[2xy-2(xy-2/3x²y)]+x²y²,其中x=3,y=-1/3
化简求值 3x²y-[2xy-2(xy-2/3x²y)]+x²y²,其中x=3,y=-1/3
化简求值 3x²y-[2xy-2(xy-2/3x²y)]+x²y²,其中x=3,y=-1/3
xy=-1
3x²y-[2xy-2(xy-2/3x²y)]+x²y²
=-3x-[-2-2(-1-2/-3x)]+1
=-3x+2-2(3x+2)+1
=-9x+2+2+1
=-27-5
=-22