若x2+4x+y2-6y+13=0则x=?y=?
已知x2+y2+4x-6y+13=0
已知实数x,Y满足x2+y2+4x-6y+13=0,则x(-Y)=
已知:实数x、y满足x2+y2-4x-6y+13=0则y的x次方=
1.已知X2+Y2-4X-6Y+13=0,求Y2-X2的值
已知x2-4x+y2-6y+13=0求x2+y2的值?
已知x2+y2+4x-6y+13=0 求x2-2x\x2+3y2
若x2-4x+y2+6y+13=0,则x=______,y=______.
已知x2+y2-6x+4y+13=0,求2x+3y
已知x2-4x+y2+6y+13=0,求x-y的值
已知:x2+4x+y2-6y+13=0,求(x-2y)/(x²+y²)
若实数x,y满足X2+y2-2X+4y=0,则x-2y的最大值为?
X2+Y2+8X+6Y+25=0 求代数式(x2-4y2/x2+4xy+4y2)-x/x+2y