Find the equation of the circle having $(1,-2)$ as its centre and passing through $3x+y=14,2x+5y=18$.

Question

$\begin{array}{1 1}x^2+y^2+2x+4y+20=0\\x^2+y^2-2x+4y+20=0\\x^2+y^2-2x-4y+20=0\\x^2+y^2+2x-4y+20=0\end{array} $

Comments

The answer is (2)