1. Limited time only! Sign up for a free 30min personal 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!

Discriminants for ellipse, parabola or hyperbola

  1. Dec 3, 2008 #1
    1. The problem statement, all variables and given/known data

    Use the discriminant to determine if the following are equations of an ellipse, parabola or hyperbola


    2. Relevant equations

    3. The attempt at a solution

    I got these answers:

    [tex]0, parabola[/tex]
    [tex]25, hyperbola[/tex]
    [tex]44, hyperbola[/tex]
    [tex]-119, ellipse[/tex]
    [tex]0, parabola[/tex]

    could someone check me on these? Thanks!
  2. jcsd
  3. Dec 3, 2008 #2


    User Avatar
    Science Advisor
    Homework Helper

    Re: Discriminants

    Shouldn't the third one be 81-4*1*5=61,hyperbola? Was that so hard you really needed a check?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Discriminants for ellipse, parabola or hyperbola
  1. Hyperbola problem (Replies: 10)

  2. Sketching a Hyperbola (Replies: 7)