JAMB Mathematics 2018 Objective — Question 27
Question 27 of 39 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2018 Objective paper, with the correct answer and a full explanation.
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If x−4 is a factor of x²−x−k, then k=
- A. 20
- B. 8
- C. 4
- D. 12Correct
Explanation
By the factor theorem, f(4)=0: 4²−4−k=0 → 16−4−k=0 → k=12.
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