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WAEC Mathematics 2026 Question 40

Question 40

Quadratic Equations

The roots of a quadratic equation are −2/3 and −1/4. Find the equation

  1. A.12x2 + 11x − 2 = 0
  2. B.12x2 − 11x + 2 = 0
  3. C.12x2 − 11x − 2 = 0
  4. D.12x2 + 11x + 2 = 0
Show the answer and explanation

Answer: D (12x2 + 11x + 2 = 0)

Explanation

(3x + 2)(4x + 1) = 12x² + 3x + 8x + 2 = 12x² + 11x + 2 = 0.