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WAEC Further Mathematics 2025 Question 17

Question 17

Matrices and Determinants

Find the value of x for which |2x −3 / x −5| = 14. (Determinant written row by row; / separates the rows.)

  1. A.2
  2. B.14/13
  3. C.−14/13
  4. D.−2
Show the answer and explanation

Answer: D (−2)

Explanation

2x(−5) − (−3)(x) = −10x + 3x = −7x = 14, so x = −2.