5x+(-2x)-[3(2x-1)-4(2x+1)]化简(要过程)化简m-(2m+n)+3(m-n),其中m=-4,n=3化简2分之1x-2(x-3分之1y^2)+(-2分之3x+3分之1y^2)其中x=-2,y=3分之2

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5x+(-2x)-[3(2x-1)-4(2x+1)]化简(要过程)化简m-(2m+n)+3(m-n),其中m=-4,n=3化简2分之1x-2(x-3分之1y^2)+(-2分之3x+3分之1y^2)其中x=-2,y=3分之2
5x+(-2x)-[3(2x-1)-4(2x+1)]化简(要过程)
化简m-(2m+n)+3(m-n),其中m=-4,n=3
化简2分之1x-2(x-3分之1y^2)+(-2分之3x+3分之1y^2)其中x=-2,y=3分之2

5x+(-2x)-[3(2x-1)-4(2x+1)]化简(要过程)化简m-(2m+n)+3(m-n),其中m=-4,n=3化简2分之1x-2(x-3分之1y^2)+(-2分之3x+3分之1y^2)其中x=-2,y=3分之2
=5x-2x-(6x-3-8x-4)
=3x-(-2x-7)
=5x+7
=(m-2m+3m)+(-n-3n)
=2m-4n
=2×(-4)-4×3
=-8-12
=-20
=1/2x-2x+3分之2y²-2分之3x+3分之1y²
=(1/2x-2x-3/2x)+(3分之2y²+3分之1y²)
=-3x+y²
=-3×(-2)+(3分之2)²
=6+9分之4
=58/9

  1. 5x+(-2x)-[3(2x-1)-4(2x+1)]

    =5x-2x-6x+3+8x-4

    =5x-1

  2. m-(2m+n)+3(m-n)
    =m-2m-n+3m-3n

    全部展开

    1. 5x+(-2x)-[3(2x-1)-4(2x+1)]

      =5x-2x-6x+3+8x-4

      =5x-1

    2. m-(2m+n)+3(m-n)
      =m-2m-n+3m-3n

      =2m-4n

      =-8-12

      =-20

    3. 2分之1x-2(x-3分之1y^2)+(-2分之3x+3分之1y^2)
      =2分之1x-2x+3分之2y^2-2分之3x+3分之1y^2

      =-3x+y^2

      =(-3*-2)+9分之4

      =6又9分之4


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