WAEC Mathematics 2020 Objective — Question 23
Question 23 of 50 from the West African Examinations Council (WAEC) Mathematics 2020 Objective paper, with the correct answer and a full explanation.
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Simplify: a/b - b/a - c/b.
- A. a-b+c
- B. (ab-bc-ac)/ab
- C. (a^2-b^2+ac)/ab
- D. (a^2-b^2-ac)/abCorrect
Explanation
Finding the LCM (ab) of a/b - b/a - c/b and combining over the common denominator gives (a^2-b^2-ac)/ab.
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