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Homework Help: Areas between curves

  1. Dec 5, 2007 #1
    1. The problem statement, all variables and given/known data
    Find the area between
    x=2(y^2) and x+y=1

    3. The attempt at a solution
    First I'm trying to find their intersection so

    To solve for y I set up:

    But, I notice that my teacher did:
    y=-1, 1/2

    Why are these 2 methods bringing about different answers? Shouldn't they be the same?
  2. jcsd
  3. Dec 5, 2007 #2


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    Science Advisor
    Homework Helper

    Don't double post.
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