Solve for x: x² - 7x - 18 = 0
- A. x = 10 or x = -3
- B. x = 9 or x = -1
- C. x = -9 or x = 2
- D. x = 9 or x = -2 ✓
Correct answer
D. x = 9 or x = -2
Explanation
Factor the quadratic: (x - 9)(x - -2) = 0, so x = 9 or x = -2.
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