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What is the equation of a parabola with (−1, −3) as its focus and y = 1 as its directrix? Enter the equation in the box.
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What is the equation of a parabola with (−1, −3) as its focus and y = 1 as its directrix? Enter the equation in the box.

User Goku
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1 Answer

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(x-h)^2=-4a(y-k)
(x+1)^2=-4(y+3)
User Okke Klein
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