已知X2+4y2+6x-4y+10=0,求X,y的值
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+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x2-4x+y2+6y+13=0,求x-y的值
已知x2+y2-10x-6y+34=0,求y\x+y的值
已知x2+4y2-4x-4y+5=0,求x-y的值,
已知:x2+2x+y2-6y+10=0,求x,y的值.
已知x2+y2+2x-6y+10=0,求x+y的值.
已知x2-2x+y2+6y+10=0,求(2x-y)的值
已知x2+4x+y2-2y+5=0,求x,y的值.
已知x2+y2-4x+6y+13=0,求x2-6xy+9y2的值.
已知[(x2+y2)-(x-y)2+2y(x-y)]÷4y=1,求4x/4x2-4y2-1/2x+y的值,