JAMB Mathematics 1998 Question 32

Question 32

Coordinate Geometry

If the distance between the points (x, 3) and (−x, 2) is 5. Find x.

  1. A.6.0
  2. B.2.5
  3. C.√6
  4. D.3
Show the answer and explanation

Answer: C (√6)

Explanation

(2x)² + 1² = 25, so 4x² = 24, x² = 6 and x = √6.