1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Another conics question

  1. Nov 7, 2008 #1
    1. The problem statement, all variables and given/known data

    graph the following:

    2. Relevant equations

    [tex]x^2-4y^2+2x+8y-7=0[/tex]

    3. The attempt at a solution

    So far I've gotten to [tex](x+1)^2 = -4(y-2)[/tex]
    If that's right, I have p = -1 and v = (-1 , 2) and directrix: y=2. Could someone double check me to see if I'm doing it right?

    Thanks
     
  2. jcsd
  3. Nov 7, 2008 #2

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    No, that's completely wrong! What happened to the y2 in the original equation? Try completing the square in y again!

     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Another conics question
  1. Another question (Replies: 3)

Loading...