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-   -   x^-4x-12y-20=0 find vertex,latus rectum,focus and directrice (https://www.askmehelpdesk.com/showthread.php?t=748624)

  • May 12, 2013, 06:38 PM
    wana
    x^-4x-12y-20=0 find vertex,latus rectum,focus and directrice
    how to find the vertex, focus , latus rectum and the directrice if the equation is x^2-4x-12y-20=0
  • May 13, 2013, 06:28 PM
    catlady23
    Here's your answer, I hope you learn from it and apply this knowledge towards other questions.

    x^2-4x-12y-20=0 - Wolfram|Alpha
  • May 14, 2013, 05:48 AM
    ebaines
    wana: you need to cmvret the equation into the standard for, which is:



    where are constants. You should be able to get the equation into this form through algebra manipulation. Once you have this then the vertex is at and the focus is p units away from the vertex towards the inside of the parabola. The latus rectum is the line that passes through the focus that is perpendicular to the axis of symmetry. The directriox is a line also perpendicular to the axis of symmetry but passing through a point p units from the vertex on the outside of the parabola.

    Post back with what you gert for answers and we'll check it for you.

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