已知x2+y2-2x-6y+10=0,则4/(y+1/x)=
已知x2+4x+y2-2y+5=0,则x2+y2=______.
已知两圆x2+y2-10x-10y=0,x2+y2+6x-2y-40=0,
已知实数x,y满足x2+y2-2x+4y=0,则x2+y2的最小值是
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 求x2-2x\x2+3y2
已知x2+4y2+x2y2-6xy+1=0,求 x4-y4/2x-y 乘 2xy-y2/xy-y2 除以(x2+y2/x
已知x2-2x+y2+6y+10=0,求(2x-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+y2-6x+4y+13=0,求2x+3y
已知x2+y2+4x-6y+13=0
已知[(x2+y2)-(x-y)2+2y(x-y)]÷4y=1,求4x/4x2-4y2-1/2x+y的值,