Answer:
Below in bold.
Step-by-step explanation:
To find an equation of a circle we need the length of the radius and the coordinates of the centre.
The general form is (x - j)^2 + (y - k)^2 = r^2 where (j, k) is the centre and r is the radius.
So our equation is:
(x - 1)^2 + (y - 3)^2 = (√5)^2
(x - 1)^2 + (y - 3)^2 = 5.
