Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Find the area bounded by the parabolas

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

    find the area bounded by the parabolas [tex]y=2x^2-x-15[/tex] and [tex]y=x^2-4x-5[/tex]

    2. Relevant equations

    3. The attempt at a solution

    I got x = 2 and x = -5; is that right?
    If so, why do I keep getting an area of 76.17 when I integrate from -5 to 2? I end up with [tex](2.67+6-20)-(41.67+37.5+50)[/tex]
  2. jcsd
  3. Sep 8, 2008 #2
    Graph the equations and then consider calculating the area by integrating them in three parts and adding up the absolute values of the area.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook