WAEC Mathematics 2025 Objective — Question 9
Question 9 of 51 from the West African Examinations Council (WAEC) Mathematics 2025 Objective paper, with the correct answer and a full explanation.
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If x=3 and y=-1, evaluate 2(x^2 - y^3).
- A. 24
- B. 22
- C. 20Correct
- D. 16
Explanation
2(x^2-y^3) = 2(3^2-(-1)^3) = 2(9-(-1)) = 2(9+1) = 2(10) = 20.
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