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WAEC Mathematics 2001 Question 21

Question 21

Quadratic Equations

Which of the following is not a quadratic expression?

  1. A.y = 2x2 − 5x
  2. B.y = x(x − 5)
  3. C.y = x2 − 5
  4. D.y = 5(x − 1)
Show the answer and explanation

Answer: D (y = 5(x − 1))

Explanation

5(x − 1) = 5x − 5 has no x2 term, so it is linear.