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Find an equation for the parabola that has its vertex at the origin and directrix x=-9.
If your answer is in the form x^2=Ay, then input here: A=
if your answer is in the form y^2=Ax, then input here: A= .

  • precalculus - ,

    using y^2 = 4px , p = 9
    so we get y^2 = 36x , placing the focus on the x-axis
    comparing this with your y^2 = Ax
    would make A = 36

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