Find the equation of the directrix of the parabola $y = -2x^2 + 4x - 8.$
Question:
Find the equation of the directrix of the parabola $y = -2x^2 + 4x - 8.$
Answer:
Let's think step by step.

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y = -\frac{47}{8}
Find the equation of the directrix of the parabola $y = -2x^2 + 4x - 8.$
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