∵圆x2+y2-x+2y=0,∴(x-12)2+
∵圆x2+y2-x+2y=0,∴(x-12)2+
已知圆x2+y2-2x-2y+1=0求x2+y2的最大值
已知两圆x2+y2-10x-10y=0,x2+y2+6x-2y-40=0,
判定圆x2+y2-6x+4y+12=0与圆x2+y2-14x-2y+14=0是否相切.
实数k为何值时,两圆C1:X2+Y2+4X-6Y+12=0,C2:X2+Y2-2X-14Y+K=0
求圆x2+y2+2x-6y+1=0与圆x2+y2+2y-..
已知x2+4x+y2-2y+5=0,则x2+y2=______.
若X2+Y2-2X-6Y+10=0 ,求(x2-y2)/xy的值
已知方程x2 +y2+4x-2y-4=0,求x2 +y2的最大值
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
X2+Y2+8X+6Y+25=0 求代数式(x2-4y2/x2+4xy+4y2)-x/x+2y
已知x2+y2+4x-6y+13=0 求x2-2x\x2+3y2