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WAEC Further Mathematics 2021 Question 12

Question 12

Binary Operations

A binary operation * is defined on the set of real numbers, R, by p * q = (q2 − p2)/(2pq). Find 3 * 2

  1. A.13/12
  2. B.5/12
  3. C.−5/12
  4. D.−1/2
Show the answer and explanation

Answer: C (−5/12)

Explanation

p = 3, q = 2: (4 − 9)/12 = −5/12.