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: What am i doing wrong?

  1. Apr 13, 2010 #1
    what am i doing wrong???

  2. jcsd
  3. Apr 13, 2010 #2


    Staff: Mentor

    Re: what am i doing wrong???

    You have the right value for the integral you show. If you are calculating area, then you shouldn't get a negative value, so your integral is set up wrong in that case.
  4. Apr 13, 2010 #3


    User Avatar
    Science Advisor

    Re: what am i doing wrong???

    If the problem was "Find the area between [itex]x= y^2- 4y[/itex] and [itex]x= 2y- y^2[/itex] for y between 0 and 3" you should note that [itex]2y- y^2> y^2- 4y[/itex] for y between 0 and 3 so you have the subtraction backwards.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook