Solve for x: x² + 8x - 9 = 0
- A. x = 1 or x = -9 ✓
- B. x = 1 or x = -8
- C. x = 2 or x = -10
- D. x = -1 or x = 9
Correct answer
A. x = 1 or x = -9
Explanation
Factor the quadratic: (x - 1)(x - -9) = 0, so x = 1 or x = -9.
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