若X+Y=3,XY=1,则-5X-5Y+3XY的值是多扫?
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若x-y=4,xy=1,则(2x+y-2xy)-(3x+2y+xy)-(4xy+3y-5x)=
若1/x+1/y=2,则(2x-xy+2y)÷(3x+5xy+3y)
若xy/x+y=2,则3x-5xy+3y/-x+3xy-y=?/是分之
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( )若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( )
若实数x,y满足1/x-1/y=5,则分式3x-2xy-3y/x+xy-y的值等于?
1/x-1/y=x,求5y+xy-5y/y-xy-x=?
若x-y=1,xy=5,则x^2y-xy^2=
若x/1-y/1=5,则x-2xy-y/2x+5xy-2y=?
已知1/x-1/y=3,则(5x+xy-5y)/(x-xy-y) =9=
若1/x-1/y=3,5x+3xy-5y/3x-xy-3y
已知1/X-1/Y=3 则(5X+XY-5Y)/(X-XY-Y)=?
已知1/x-1/y=-3,则x+5xy-y/3x-2xy-3y=
若1/X-1/Y=3,求5X+2XY-5Y/X-4XY-Y
若1/x-1/y=3,求5x+2xy-5y/x-4xy-y的值
已知1/x=3+1/y,则(2x-5xy-2y)/(y+3xy-x)=_______.
已知1/x-1/y=3,则5x+xy-5y/x-xy-y等于
已知1/x-1/y=3,则5x+xy-5y/x-xy-y的值为?