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    Caitlin4's Avatar
    Caitlin4 Posts: 1, Reputation: 1
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    #1

    Dec 5, 2010, 12:52 PM
    Find the vertex, focus, and directrix of (x+2)^2 = 12y
    It is just about in the standard form of (x-h)^2 = 4p(y-k). My problem is getting 12y into the 4p(y-k) form. I'm dying over here. Any help would be monumental.
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Dec 5, 2010, 02:19 PM

    p is the distance from the vertex to the focus and from the vertex to the directrix.

    12=4p, p=3.

    vertex at (-2,0)
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