已知2x^2-xy-3y^2=0,且x不等于-y.求x/{y-[x^2/(x-y)]}的值.

来源：学生作业帮助网编辑：六六作业网时间：2024/12/20 09:46:20

已知2x^2-xy-3y^2=0,且x不等于-y.求x/{y-[x^2/(x-y)]}的值.已知2x^2-xy-3y^2=0,且x不等于-y.求x/{y-[x^2/(x-y)]}的值.已知2x^2-x

已知2x^2-xy-3y^2=0,且x不等于-y.求x/{y-[x^2/(x-y)]}的值.
已知2x^2-xy-3y^2=0,且x不等于-y.求x/{y-[x^2/(x-y)]}的值.

已知2x^2-xy-3y^2=0,且x不等于-y.求x/{y-[x^2/(x-y)]}的值.
2x²-xy-3y²=0
(x+y)(2x-3y)=0
x=-y,2x=3y
x≠-y
所以y=(2/3)x
原式=(x²+2/3*x²)/(2/3*x²-4/9*x²-x²)=-15/7

2x^2-xy-3y^2=0得（2x-3y)(x+y)=0
∵x≠y,∴x=1.5y,将之代入即可

已知xy不等于零,且3x^2-2xy-8y^2=0,求x/y的值已知xy≠0,且2x+3xy-2y=0,求(x+y)/(x-y)的值. 已知:x>0,y>0,且x- 10√xy+25y=0,求2x+√xy+3y/x+√xy-y 已知x-y=4xy且xy≠0,求代数式-x-2xy+y分之2x+3xy-2y的值已知2x^2-3xy+y^2=0,xy不等于零,求x/y+y/x的值已知x>0,y>0,且x+2y+xy=30,求xy的最大值已知X>0,Y>0且X+2Y+XY=30求XY最大值已知x>0,y>0,且2x+3y=1,则xy的最大值已知x>0,y>0,且2/x+3/y=1,求xy的最小值. 已知xy=3,且x>0,y>0求2x+5y的最小值已知|x|=2,|y|=3,且xy大于0,求x+y的值已知|X|=3,|Y|=2,且XY 已知：|x|=3,|y|=2,且xy 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^2-2XY-8Y^2=0,求x/y的值急啊! 已知xy≠0,且3x^2-2xy-8y^2=0,求x/y的值? 已知 xy不等于0且 3x^2 - 2xy - 8y^2=0求x/y的值!