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OpenStudy (anonymous):
Derive the equation of the parabola with a focus at (−5, 5) and a directrix of y = -1. f(x) = −one twelfth (x − 5)2 + 2 f(x) = one twelfth (x − 5)2 + 2 f(x) = −one twelfth (x + 5)2 + 2 f(x) = one twelfth (x + 5)2 + 2
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OpenStudy (anonymous):
the 2 after the little (x plus.minus 5) is a square
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