若X^2-5XY+6Y^2=0,则X与Y的比值是 （请写出计算过程）

若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值 若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值 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)^2=0则x^2+y^2= 若(x+y-5)²+(xy-6)²=0,则（x+y)²-2xy的值为? 若2x^2-6xy+9y^2-4x+4=0,则y/x-x/y=若2x^2-6xy+9y^2-4x+4=0,则y/x-x/y=? 若实数x,y满足x^2-xy-y^2 =0,则x/y=? 若|x-3|+（y+2）=0,则（x-y+4xy/x-y）（x+y-4xy/x+y）的值是 若|x-3|+（y+2）²=0,则（x-y+4xy/x-y）（x+y-4xy/x+y）的值是 若x+y=1,x不等于0则x+(2xy+y^2)/x/(x+y)/x= 2x^+xy-y^-4x+5y-6=? 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 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y-2x=0,则分式(x^2+xy+y^2)/(x^2-xy+2y^2)=