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Homework Help: Calculus - Describing a Set

  1. May 8, 2014 #1
    1. The problem statement, all variables and given/known data

    Describe the set {x:|x2-5|<4}

    2. Relevant equations

    3. The attempt at a solution

    I know this is simple stuff but I'm confused as to what way I'm supposed to answer this.

    My current answer is:


    Is that all the question asks for? Do I need to say anything else?
  2. jcsd
  3. May 8, 2014 #2


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    Science Advisor

    If [itex]1< x^2< 9[/itex] then either [itex]1< x< 3[/itex] or [itex]1< -x< 3[/itex] so the solution set is two intervals.
  4. May 8, 2014 #3
    Ok thanks for the help HallsofIvy
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