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Math Help - integral

  1. #1
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    integral

    find
    integral-604997342.jpg
    by using substitution with u= 4+x^2
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  2. #2
    MHF Contributor
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    Quote Originally Posted by BAHADEEN View Post
    find
    Click image for larger version. 

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    by using substitution with u= 4+x^2
    u=4+x^2\Rightarrow\ du=2xdx

    \displaystyle\frac{1}{2}\int{\frac{\left(x^2\right  )2xdx}{\sqrt{4+x^2}}=\frac{1}{2}\int{\frac{(u-4)}{\sqrt{u}}}du
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