(-5xy)*3x^2y-12x^3*(-7/4y^2)
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(-5xy)*3x^2y-12x^3*(-7/4y^2)(-5xy)*3x^2y-12x^3*(-7/4y^2)(-5xy)*3x^2y-12x^3*(-7/4y^2)(-5xy)*3x^2y-12x
(-5xy)*3x^2y-12x^3*(-7/4y^2)
(-5xy)*3x^2y-12x^3*(-7/4y^2)
(-5xy)*3x^2y-12x^3*(-7/4y^2)
(-5xy)*3x^2y-12x^3*(-7/4y^2)
=-15x^3y^2+21x^3y^2
=6x^3y^2
因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
化简:3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
化简(3x^2-5xy)+{-x^2-[-3xy+2(x^2-xy)+y^2]}
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)
-x^5y-xy+2x^3y
已知x+y分之xy=2,那么3x-5xy+3y分之3xy-x-y=
若xy/x+y=2,则3x-5xy+3y/-x+3xy-y=?/是分之
xy/x+y=2 求3x-5xy+3y/-x+3xy-y的值?
如果xy/x+y=2,那么3x-5xy+3y/-x+3xy-y=?
若xy=2(x+y),求 (3x-5xy+3y)÷(-x+3xy-y) 的值
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
已知X+Y分之XY=2,求-X+3XY-Y分之3X+5XY+3Y
已知Y-x=3xy,求(5x+3xy-5y)÷(x-2xy-y)
已知xy/x+y=3,求代数式2x-5xy+2y/x-3xy+y
已知xy/x+y=2,求代数式3x-5xy+3y/-x+2xy-y的值
当x+y=5xy时,(3x+xy+3y)/x-2xy+y=?