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WAEC Mathematics 2026 Question 32

Question 32

Algebraic Expressions

For what values of m is the expression (m + 1)/(3m2 − 2m − 5) not defined?

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

Answer: C (−1 and 5/3)

Explanation

The denominator 3m² − 2m − 5 = (3m − 5)(m + 1) is zero when m = 5/3 or m = −1.