已知4X^2-9Y^2=0,且XY不等于0,则X比Y=

已知4X^2-9Y^2=0,且XY不等于0,则X比Y= 已知x*x-2xy-3y*y=0且x不等于0 y不等于0,那么5x-4y/5x+4y= 已知XY不等于0,且3X^2-2XY-8Y^2=0,求x/y的值急啊! 已知 xy不等于0且 3x^2 - 2xy - 8y^2=0求x/y的值! 已知,xy不等于0,且3x方-2xy-8y方=0,则x分之y等于 已知xy不等于0,且3x² -2xy-8y²=0,求x/y的值 已知x^2-4xy+3y^2=0,且xy不等于0,求x/y+y/x的值 已知5x-4y=0且xy不等于0,求x^2+y^2/x^2-y^2-x+y/x-y的值 已知xy均不等于0,且x-y=2xy,则 2 2 一一 -已知xy均不等于0,且x-y=2xy,则2 2一一 - 一一x y值是 已知x^2-7xy+12y=0,且x.y不等于0,求x^2-2xy+y^2/2xy的值 已知x-3y=0,且xy不等于0,求分式x*2-xy+y*2/x*2+xy+y*2的值 已知x-3y=0,且xy不等于0,求分式x^2+xy+y^2分之x^2-xy+y^2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2x^2+5xy-7y^2=0,且y不等于0 求x/y的值 已知x^2-3xy-10y^2=0,且y不等于0,则x/y的值为? 已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y) 已知xy不等于0,且3x2-2xy-8y2=0,求x/y的值? 已知2x2+5xy-3y2=0且xy不等于0,求x:y的值已知2x2+5xy-3y2=0且xy不等于0,求xy的值