已知x^2-5xy+6y^2=0,则y:x等于

已知2/X-1/Y=3,则(X-2Y-XY)/(5XY+6Y-3X)=? 已知2/x-1/y=3,则(2y-x+4xy)/(3x-6y-5xy)=? 已知x ^2-5xy+6y^2=0,则y：x等于多少 已知x^2-5xy+6y^2=0,则y:x等于 已知x ^2-5xy+6y^2=0,则y:x等于多少 已知x^2-5xy+6y^2=0,则x:y的值为 已知x>0,y>0,且x+6y=5根号xy,求(2x+根号xy-y)分之(x+根号xy+2y)的值 已知X-XY-2Y=0求2X+3XY-Y/X-2XY+5Y 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=2xy,且xy不等于0,则求-2x+6xy-2y/(7x+5y)-9xy-(3x+y)=___ 已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y) 已知x^2+y^2-4x+6y+13=0求(xy+y^2/5x^2-5xy+xy+y^2)·（5/x+y）-（y/x-y） 已知x>0,y>0,x+根号xy-6y=0,求4x+5根号xy-6y分之x+2根号xy 已知x大于0 y大于0 且x+6y=5根号xy 求x+根号xy+2y分之2x+根号xy-y的值已知x大于0 y大于0 且x+6y=5根号xy求x+根号xy+2y分之2x+根号xy-y的值 已知x+y=5,xy=2则x^2y+xy^2=( ) 已知x+y=6,xy=-3,则x^2y+xy^2=? 已知x+y=1,xy=1/5,则x^2y=xy^2