Which of the following is a root of the quadratic equation x² - 5x + 6 = 0?
A1
B2CORRECT
C4
D6
GCEMathematicsQuadratic Equations2024
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Why the answer is B, and why the others tempt you.
Factorising x² - 5x + 6 = 0 gives (x - 2)(x - 3) = 0, so x = 2 or x = 3. Among the options, 2 is a root. Substituting x = 2: 4 - 10 + 6 = 0 ✓
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