Solve for x: x² + 9x + 18 = 0
- A. x = 6 or x = 3
- B. x = -6 or x = -2
- C. x = -6 or x = -3 ✓
- D. x = -5 or x = -4
Correct answer
C. x = -6 or x = -3
Explanation
Factor the quadratic: (x - -6)(x - -3) = 0, so x = -6 or x = -3.
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