若x-y=5xy=6则x^2y-xy^2=,x^2y-xy^2=,x^2+y^2= 用分解因式
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若xy/x+y=2,则3x-5xy+3y/-x+3xy-y=?/是分之
若x-y=4,xy=1,则(2x+y-2xy)-(3x+2y+xy)-(4xy+3y-5x)=
若x-y=5,xy=6,求x^2-xy^2和x^2y+xy^2
若 x+y=5,xy=-50 则x^2y+xy^2 =( )
若x-y=1,xy=5,则x^2y-xy^2=
若x+y=5,xy=6,求x^2y+xy^2的值
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少?
若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少?
若xy/x+y=2,则3x-xy+3y/-x+3xy-y=
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy)
若xy=2(x+y),求 (3x-5xy+3y)÷(-x+3xy-y) 的值
x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________?
2x^+xy-y^-4x+5y-6=?
若x/1-y/1=5,则x-2xy-y/2x+5xy-2y=?
若1/x+1/y=2,则(2x-xy+2y)÷(3x+5xy+3y)
已知2/X-1/Y=3,则(X-2Y-XY)/(5XY+6Y-3X)=?