作业帮已知x+y=2xy,且xy不等于0,则求-2x+6xy-2y/(7x+5y)-9xy-(3x+y)=___
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 22:03:05
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=2xy,且xy不等于0,则求-2x+6xy-2y/(7x+5y)-9xy-(3x+y)=___
已知x+y=2xy,且xy不等于0,则求-2x+6xy-2y/(7x+5y)-9xy-(3x+y)=___
-2x+6xy-2y/(7x+5y)-9xy-(3x+y)
=[3(x+y)-x-y]/[7x+5y-9/2(x+y)-3x-y]
=2(x+y)/[-1/2(x+y)]
=-4
(-2x+6xy-2y)/[(7x+5y)-9xy-(3x+y)]
=[-2(x+y)+6xy]/[(7x+5y-9xy-3x-y)]
=(-4xy+6xy)/[4(x+y)-9xy]
=2xy/(8xy-9xy)
=2xy/(-xy)
=-2
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
已知x+y=2xy,且xy不等于0,则求-2x+6xy-2y/(7x+5y)-9xy-(3x+y)=___
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,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-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2x^2+5xy-3y^2=0,则x^2-y^2/xy的值是?
若3x^2+3xy=0且xy不等于0,则x:y=
已知2x^2+5xy-7y^2=0,且y不等于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x的平方-3xy+2y的平方=0且xy不等于0,求x/y+y/x的值.
已知x-3y=0,且xy不等于0,求分式x平方+xy+y平方分之x平方-xy+y平方的值