WAEC Further Mathematics 2022 Objective — Question 40
Question 40 of 40 from the West African Examinations Council (WAEC) Further Mathematics 2022 Objective paper, with the correct answer and a full explanation.
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The length of the line joining points (x,4) and (−x,3) is 7 units. Find the value of x.
- A. 4√3
- B. 2√6
- C. 3√2
- D. 2√3Correct
Explanation
Distance = √[(−x−x)²+(3−4)²] = 7. Squaring: 4x²+1=49, so x²=12, giving x=√12=2√3.
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