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WAEC Mathematics 2023 Question 9

Question 9

Quadratic Equations

Find the roots of the quadratic equation: 3m2 − 2m − 65 = 0.

  1. A.(13/3, 5)
  2. B.(−13/3, −5)
  3. C.(−13/3, 5)
  4. D.(13/3, −5)
Show the answer and explanation

Answer: C ((−13/3, 5))

Explanation

3m² − 2m − 65 = (3m + 13)(m − 5), so m = −13/3 or m = 5.