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Homework Help: 1 more Trig?

  1. Aug 22, 2005 #1
    Fins an equation for the parabola with focus at (-5,0) and vertex at (-5,-4).

    I have come up with:

    x^2 + 10x + 16y + 89 = 0

    How far off am I?
     
  2. jcsd
  3. Aug 22, 2005 #2

    HallsofIvy

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    Science Advisor

    Can't you check for yourself?

    Is it a parabola? (That's easy- there is an x2 term but no y2 term.)

    What is the vertex? (Solve for y, then complete the square.)

    What is the focus? (You will need to know the equation for the focus of a given parabola.)
     
  4. Aug 22, 2005 #3
    That is what I am having trouble determining. Can you show me step by step how to check myself?
     
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