已知xy≠0,且3x2-2xy-8y2=0,则xy
已知2x2-3xy+y2=0(xy≠0),则xy+yx的值是( )
已知xy不等于0,且3x2-2xy-8y2=0,求x/y的值?
已知x2-y2=xy,且xy≠0,求代数式x2y-2+x-2y2的值.
已知2x2+xy-3y2=0(y≠0),求xy
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2x2+5xy-3y2=0且xy不等于0,求x:y的值
已知x2+xy=3,xy+y2=-2,则2x2-xy-3y2=______.
已知x2+xy=3,xy+y2=-2,则2x2-xy-3y2的值为( )
已知x2-xy=-3,2xy-y2=-8,求2x2+4xy-3y2的值.
已知x、y是实数且满足x2+xy+y2-2=0,设M=x2-xy+y2,则M的取值范围是______.
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6x2减去xy减去15y2等于0,求分式2x2减去3xy减去3y2分之x2减去2xy+4y2