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JAMB Mathematics 1985 Question 21

Question 21

Quadratic Equations

If the quadratic function 3x2 − 7x + R is a perfect square, find R

  1. A.49/24
  2. B.49/3
  3. C.49/6
  4. D.49/12
  5. E.49/36
Show the answer and explanation

Answer: D (49/12)

Explanation

A perfect square has b² = 4ac: 49 = 4 × 3 × R, so R = 49/12.