已知2x^2-3xy-2y^2=0,则x+y/x-y=?
1个回答
2x^2-3xy-2y^2=0,
(x-2y)(2x+y)=0
x=2y或者 x=-1/2y
分别代入x+y/x-y,得出x+y/x-y=3
相关问题
已知x^2-3xy+2y^2=0(xy≠0),则x/y+y/x=
已知x-y=3xy,则[2x+3xy−2y/x−2xy−y]=______.
已知x^2+2xy-3y^2=0,则x/y=?
已知(x+y)²=3,(x-y)²=,则[(xy+2)(xy-2)-2x²y²+
已知X/Y=2/3,则X^2-Y^2/X^2-2XY+Y^2除以XY+Y^2/X^2-XY
已知xy≠0,且3x2-2xy-8y2=0,则[x/y]=______.
已知x²-3xy+2y²=0,则y/x=
已知x2-y2=xy(xy不等于0)则x/y-y/x=____
已知x^2-xy=8,xy-y^2=3.则x^2-y^2=?,x^2-2xy+y^2=?