已知2x2+xy-3y2=0(y≠0),求xy
已知2x2+xy-3y2=0(y≠0),求xy
已知X2-2x+y2+6y+10=0,求(x2-2xy)/(xy+y2)的值
已知x2+4y2+x2y2-6xy+1=0,求 x4-y4/2x-y 乘 2xy-y2/xy-y2 除以(x2+y2/x
已知x2+y2-10x-6y+34=0,求(x-y/x+y)2÷x2-y2/xy×x2+2xy+y2/x2-xy 的值.
已知实数x、y满足2x2-7xy+3y2=0,求x:y
已知2x=3y,求xy/(x2+y2)-y2/(x2-y2)的值
已知x+2y=0(x不等于0)求分式2xy+y2/x2-xy
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
已知非零实数x,y满足:x2+xy-2y2=0,求(x2+3y+y2)/(x2+y2)的值
已知3x2+xy-2y2=0,求(x+yx-y+4xyy
已知2x2-xy-3y2=0,求x−yx+y