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Math Help - [SOLVED] area question

  1. #1
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    [SOLVED] area question

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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by jst706 View Post
    yes you did. how did you end up with x(2 - x)?

    you want \int_{0}^{2} x \sqrt {4 - x^2}~dx

    use the substitution u = 4 - x^2
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  3. #3
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    Thanks for the help. I actually tried it my wrong way, then substitution, then my wrong way again and got the wrong answer every time, but I just redid it with substitution and got the right answer...thanks a lot for the help.
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