若3x-4y=0,且X≠0,则(9x-4y)/(9x+4y)=
若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
{4/(x+y)+6/(x-y)=3 {9/(x-y)-1/(x+y)=1
y=(x+4)(x+9)/x (x>0)
若3x-4y=0,则x/y=______,(x-y)/y=______,(3x+2y)/(2x+3y)=_____.
若(x-4y)(x+3y)=0 且xy>0 则分式x+3y/2x-y的值为
已知x,y是实数,根号3x+4+y²-6y+9=0,且axy-3x=y 则a=
已知x,y为实数,根号3x+4 +y^2-6Y+9=0则x+y=?
已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值
已知x,y满足x²+y²-4x+6y+13=0则(3x+y)²-(3x+y)(3x-y)的
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
已知x,y满足{3x-y=9 {x-3y=0 求x+2y+ 4y的平方/x-2y -4x的平方y/x的平方-4y的平方