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WAEC Mathematics 1995 Question 18

Question 18

Quadratic Equations

Solve the equation (x + 2)(x − 7) = 0

  1. A.x = 1 or 8
  2. B.x = −2 or 7
  3. C.x = −4 or 5
  4. D.x = −3 or 6
  5. E.x = −5 or −m2.
Show the answer and explanation

Answer: B (x = −2 or 7)

Explanation

Either x + 2 = 0 or x − 7 = 0, so x = −2 or x = 7.