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WAEC Mathematics 2003 Question 17

Question 17

Quadratic Equations

Find the value of x in the equation 3x2 − 8x − 3 = 0

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

Answer: C (−1/3, 3)

Explanation

3x2 − 8x − 3 = (3x + 1)(x − 3) = 0, so x = −1/3 or 3.