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