已知x ^2+9y ^2-2x+12y+5=0,则x=____,y=____.

已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 9(x-y)-12(y-x)^2 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 已知2x-y/x+2y=3,求2(2x-y)/x+2y-9(x+2y)/2x-y+3的值. 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值 已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y除以2x-y 已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值 已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值 已知3x =2y 求x/x+y+y/x-y-y²/x²-y² 已知x-3y=2,已知x-3y=2,x²-9y²=12已知x-3y=2,x²-9y²=12,求2x+y的值 已知x≠y,x^2-x=y^2-y,求x+y的值. 已知x>0,Y>0,如何证x^2/y+y^2/x>=x+y 已知f(x+y,y/x)=x^2-y^2,则f(x,y)= 已知|x|=2,|y|=3,|x+y|=-(x+y)求x-y 已知x^2+y^2-8x+12y+52=0 ,求1/2x-1/x-y(x-y/2x-x^2+y^2) 已知x^2+y^2-8x+12y+52=0 ,求1/2x-1/x-y(x-y/2x-x^2+y^2) 已知x^2+y^2=12,x+y=6,求x、y的值. 已知x^2-6xy+9y^2=0,求(x-y)/(x+y)