已知x+y=3,xy=-10,则|x-y|=
已知x-y=4xy,则2x+3xy-2yx-2xy-y
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
已知xy/x+y=2,则代数式3x-5y+8y/-x+3xy-y的值
已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y)
已知x+y=3,xy=1,则4x+3xy+4y=
已知x+y=6,xy=-3,则x^2y+xy^2=?
已知x+y=6,xy=-3,则x^2y+xy^2=
已知x+y=5,xy=-3,则x^2y+xy^2,
已知1/x=1/y=6,则3x-2xy+3y/3xy+x+y=?
已知X/Y=2,则X²+2XY-3Y²/X²-XY+Y²=?
已知1/x-1/y=-3,则5x+xy-5y/x-xy-y的值为
已知1/x=1/y+3,则(5x+xy-5y)/(x-xy-y)的值为( )