Question
Find the value of x, so that the point (6, 5, -3) is at a distance of 13 units from the point (x, -7, 0).
Solution
The given points are A (6, 5, -3) and B (x, -7, 0)
Given that
Squaring both sides, we get
x = 2, x = 10
Hence, the value of x is 2 or 10.