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Math Help - Integral

  1. #1
    Member Awsom Guy's Avatar
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    Integral

    Hi.
    Question:
    (x-1)(x+1) this is an integral question.
    I know how to integrate but I am not sure what to do when you have two pairs of brackets. I know how to do a question like (2x+1)^2. Can some one please help me get a start.
    Thanks
    Last edited by Awsom Guy; February 13th 2010 at 02:44 AM.
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  2. #2
    MHF Contributor
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    You're right to think there are strategies for dealing with a product, but you should also have a quick look to see if it doesn't split into a sum of easy ones... i.e. multiply out
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  3. #3
    Member Awsom Guy's Avatar
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    thanks I'll try
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  4. #4
    Member mathemagister's Avatar
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    Quote Originally Posted by Awsom Guy View Post
    Hi.
    Question:
    (x-1)(x+1) this is an integral question.
    I know how to integrate but I am not sure what to do when you have two pairs of brackets. I know how to do a question like (2x+1)^2. Can some one please help me get a start.
    Thanks
    You should find that your expression expands to x^2 - 1. Integrate that with the polynomial rule.

    In integration, a good tip is to always see if, even a complicated-looking function, can be expanded to became a bunch of simple terms.
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