What is the axis of symmetry of the parabola y = x² + 8x + 3?
Correct answer: B. x = −4
- A. x = −8
- B. x = −4
- C. x = 4
- D. x = 8
Explanation
For y = ax² + bx + c, the axis of symmetry is x = −b/(2a). Thus x = −8/2 = −4, while x = 4 results from missing the negative sign.
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