Question 59987
You could use the distance formula: {{{d = sqrt((x2-x1)^2 + (y2-y1)^2)}}}
Where: (5, 2) = (x1, y1) and (5, -2) = (x2, y2)
But the two point lie on a vertical line (the x-coordinates for the point are the same), so it is simpler to just subtract the two y-coordinate values.

d = y2 - y1 = -2 - 2 = -4  Take the absolute value: |-4| = 4

The distance is 4.