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WAEC Mathematics 2000 Question 37

Question 37

Quadratic Equations

Solve the equation 3y2 = 27y.

  1. A.y = 0 or 3
  2. B.y = 0 or 9
  3. C.y = −3 or 3
  4. D.y = 3 or 9
Show the answer and explanation

Answer: B (y = 0 or 9)

Explanation

3y2 − 27y = 3y(y − 9) = 0, so y = 0 or y = 9.