已知5x2-xy-6y2=0,则yx
已知5x2-xy-6y2=0,则yx
已知x2+y2-6x-8y+25=0,求代数式yx−xy
已知x2+y2-2x-4y+5=0,分式yx−xy
已知2x2-3xy+y2=0(xy≠0),则xy+yx的值是( )
已知x2+3xy-4y2=0(y≠0),则x−yx+y
已知3x2+xy-2y2=0,求(x+yx-y+4xyy
已知x2-4xy+4y2=0,那么分式x-yx+y
已知2x2-xy-3y2=0,求x−yx+y
已知x2+xy=5,xy+y2=-1,则x2-y2=______.
已知x2-5xy+6y2=0,则y:x等于( )
已知x2+xy=2,y2+xy=5,则12x2+xy+12y2=___.
已知x2+4y2+x2y2-6xy+1=0,求 x4-y4/2x-y 乘 2xy-y2/xy-y2 除以(x2+y2/x