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WAEC Mathematics 1993 Question 10

Question 10

Quadratic Equations

Solve the equation x2 − 2x − 3 = 0

  1. A.(−3, 1)
  2. B.(−1, −3)
  3. C.(3, 1)
  4. D.(−3, 0)
  5. E.(−1, 3)
Show the answer and explanation

Answer: E ((−1, 3))

Explanation

x2 − 2x − 3 = (x − 3)(x + 1) = 0, so x = −1 or x = 3.