若x2-6x+y2+4y+13=0,求x+y
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
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X2+Y2-2X-6Y+10=0 ,求(x2-y2)/xy的值
X2+Y2+8X+6Y+25=0 求代数式(x2-4y2/x2+4xy+4y2)-x/x+2y
已知X2+Y2+8X+6Y+25=0 求代数式X2++XY+4Y2分之X2-4Y2 减X+2Y分之X的值
已知x2+y2+4x-6y+13=0
已知x2+y2-4x+6y+13=0,求x2-6xy+9y2的值.
若x2-2x+10+y2+6y=0,求(2x+y)2