Question 948935
The general equation for a circle centered at (h,k) with radius R is,
{{{(x-h)^2+(y-k)^2=R^2}}}
Plug in what you know,
{{{(3-2)^2+(4-(-1))^2=R^2}}}
{{{1^2+5^2=R^2}}}
{{{R^2=26}}}
So then,
{{{highlight((x-2)^2+(y+1)^2=26)}}}