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