Find the root of the equation 2x\(^2\) - 3x - 2 = 0
MATHEMATICS
WAEC 1998
Find the root of the equation 2x\(^2\) - 3x - 2 = 0
- A. x = -2 or 1/2
- B. x = -2 or 1
- C. x = -2 or 2
- D. x = -1/2 or 2
Correct Answer: D. x = -1/2 or 2
Explanation
2x\(^2\) - 3x - 2 = 0
2x\(^2\) - 4x + x - 2 = 0
2x(x - 2) + 1(x - 2) = 0
(2x + 1)(x - 2) = 0
x = \(\frac{-1}{2}\) or x = 2
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