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Homework Help: Please Help me to complete the answer

  1. Dec 7, 2008 #1
    Hi all,
    can anybody complete my answer?(I'm unable to solve the second part of the integral)
    problem and answer(incomplete) : www.andishe9.com/integral.bmp[/URL]

    thanks and excuse me for english;)
    Last edited by a moderator: Apr 24, 2017
  2. jcsd
  3. Dec 7, 2008 #2


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    Welcome to PF!

    Last edited by a moderator: Apr 24, 2017
  4. Dec 8, 2008 #3
    Thank you,
    I checked the link.It works...
  5. Dec 8, 2008 #4


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    ermmm...your very first line is incorrect: your basically claiming that [itex](2x+6)-6=1[/itex] which is clearly false.

    Try a u-substitution of the form [itex]u=x+3[/itex] instead.
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