Using the quadratic formula, solve 2x² - 3x - 2 = 0. The roots are:
Ax = 2 or x = -1/2CORRECT
Bx = -2 or x = 1/2
Cx = 2 or x = 1/2
Dx = -2 or x = -1/2
GCEMathematicsQuadratic Equations2023
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Why the answer is A, and why the others tempt you.
Using the formula x = (3 ± √(9 + 16))/4 = (3 ± 5)/4. This gives x = 8/4 = 2 or x = -2/4 = -1/2. Factorising confirms: (2x + 1)(x - 2) = 0.
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