WAEC Mathematics 2024 Objective — Question 6
Question 6 of 50 from the West African Examinations Council (WAEC) Mathematics 2024 Objective paper, with the correct answer and a full explanation.
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6. If (3 - 4√2)(1 + 3√2) = a + b√2, find the value of b.
- A. 5Correct
- B. -5
- C. -21
- D. 21
Explanation
Expanding: 3+9√2-4√2-24 = -21+5√2, so a=-21, b=5.
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