find the equation of parabola with focus (0,-3) and directrix y=3
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Axis of parabola is -y axis
so equation of parabola
x^2 = -4ay
x^2=-4(3)y
x^2 = -12y
so equation of parabola
x^2 = -4ay
x^2=-4(3)y
x^2 = -12y
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