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Math

posted by on .

Find the vertex, focus, and directrix of the parabola.

x^2 - 2x + 8y + 9 = 0

x^2 - 2x +1 = -8y + 9+ 1
(x-1)^2 = -8(y-1.25)

vertex:(1,1.25)
focus:(1,-.75)
directrix: y=3.25

  • Math - ,

    Is this correct?

  • Math - ,

    it looks good to me

  • Math - ,

    My teacher said that I had sign errors. I do not see where I went wrong.

  • Math - ,

    I don't either

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