Answer:
It is x2+y2−169=0.
Step-by-step explanation:
The circle you are looking fore is composed by all the points with a distance from the origin of 13/ The distance of a point from the center is
d=√x2+y2 and this distance has to be 13, so
13=√x2+y2 and to obtain the equation we can do the square
132=x2+y2 and the final equation is
x2+y2−169=0.