已知x2+xy-2y2=0(y≠0),那么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2x2-3xy+y2=0(xy≠0),则xy+yx的值是( )
已知x2-4xy+4y2=0,那么分式x-yx+y
已知x+2y=0(x不等于0)求分式2xy+y2/x2-xy
若x<y<0,则x2−2xy+y2+x2+2xy+y2=( )
已知2x-3*根号(xy)-2y=0(x>0),则x2+4xy-16y2除以2x2+xy-9y2的值是多少?
已知实数x、y满足2x2-7xy+3y2=0,求x:y
x2+2y2-2xy-2y+1=0
已知xy满足x2+y2-6x+2y+10=0,求立方根号x2-y2的值