WAEC Mathematics 2022 Question 50

Question 50

Quadratic Equations

Solve: 6x2 = 5x − 1.

  1. A.x = 2, 3
  2. B.x = 0, 3
  3. C.x = 1/2, 1/3
  4. D.x = 1/2, −1/3
Show the answer and explanation

Answer: C (x = 1/2, 1/3)

Explanation

6x2 − 5x + 1 = 0 factorises as (3x − 1)(2x − 1) = 0, so x = 1/3 or 1/2.