In Exercises 15, graph the conic section with the given equation. For ellipses, find the foci. For
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In Exercises 1–5, graph the conic section with the given equation. For ellipses, find the foci. For hyperbolas, find the foci and give the equations of the asymptotes. For parabolas, find the vertex, focus, and directrix.
4x2 - y2 + 8x + 2y + 7 = 0
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