For what range of values of x is x\(^2\) - 2x - 3 ≤ 0
FURTHER MATHEMATICS
WAEC 2021
For what range of values of x is x\(^2\) - 2x - 3 ≤ 0
- A. {x: -1 ? x ? 3}
- B. { x: -3 ? x ? 1}
- C. { x: -3 ? x ? -1}
- D. { x: 1 ? x ? 3}
Correct Answer: A. {x: -1 ? x ? 3}
Explanation
Let x\(^2\) - 2x - 3 = 0;
(x+1)(x-3) = 0
The zeros of the function are x = -1 and 3
The solution set is { x: -1 ≤ x ≤ 3}
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