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heathernelly

Identify the vertex, focus, and directrix of the parabola with the equation x^2 – 6x – 8y + 49 = 0

  • one year ago
  • one year ago

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  1. Hoa
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    vertex (3,5)

    • one year ago
  2. Hoa
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    we have formula to figure out the focus and directrix. temporarily cannot remember. let me check

    • one year ago
  3. Hoa
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    yes. focus (3,10)

    • one year ago
  4. heathernelly
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    how did you get that?

    • one year ago
  5. heathernelly
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    like can you show me step by step please because i have a bunch of other problems that are the same :)

    • one year ago
  6. Hoa
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    to get vertex, you isolate y, take y', let y'=0 to get x, y of the vertex

    • one year ago
  7. Hoa
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    to get focus, you have formula x^2 =4py, your x is (x-3) your y = y-5---> p =10

    • one year ago
  8. Hoa
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    the directrix is y =-p = -10

    • one year ago
  9. Hoa
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    I think so. check your answer book. long time , i may not be right.

    • one year ago
  10. heathernelly
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    thanks a lot :)

    • one year ago
  11. Hoa
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    you 're welcome

    • one year ago
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