Question

find the points on the y-axis , each of which is at a distance of 13 units from the point (-5,7).

Answer 1

Let, the point on y-axis be (0, k).
Then we find the distance between (-5, 7) and (0, k), and we see that
k = -5, 19.
Hence, the point is (0, -5) or (0, 19).