Solve for x: x² - 2x - 63 = 0
- A. x = 9 or x = -7 ✓
- B. x = 10 or x = -8
- C. x = -9 or x = 7
- D. x = 9 or x = -6
Correct answer
A. x = 9 or x = -7
Explanation
Factor the quadratic: (x - 9)(x - -7) = 0, so x = 9 or x = -7.
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