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Mathematics, 03.11.2020 15:30 cheesedoodle

If a parabola's focus is at (1, −1) and the directrix is at y = 7, what is the equation representing this parabola? x2 − 2x + 16y − 47 = 0
x2 − 47 = 0
x2 − 2x + 16y − 49 = 0
x2 − 2x + 2y2 + 16y − 47 = 0

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