- \(x^2+y^2+6x-4y-3 = 0\)
\(x^2+6x+y^2-4y = 3\)
\(x^2+6x+9+y^2-4y+4 = 3+9+4\)
\((x+3)^2+(y-2)^2 = 16\)
∴ center is at \((-3, 2)\) and radius is 4
- center at \((1, 4)\) and radius is 3
\((x-1)^2+(y-4)^2 = 9\)
\(x^2-2x+1+y^2-8y+16 = 9\)
\(x^2+y^2-2x-8y+8=0\)