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Thread: integration help!

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    integration help!

    how does one integrate
    ∫x(x+2)e^x dx
    answer ends up x^2e^x + c

    thanks in advance

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    617 pages fan96's Avatar
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    Re: integration help!

    To be honest that doesn't look like an integral that could be given to a 2U student without first prompting them to differentiate . I might be missing something but I don't see how you could do that using only 2U methods.
    Last edited by fan96; 15 Mar 2018 at 8:08 PM.
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    Re: integration help!

    it's actually the second part of a question,
    it originally asked us to differentiate x^2e^x
    and then hence find ∫x(x+2)e^x dx , i knew the answer should be x^2e^x because that was basically given to us in the first part, but getting to it was what i was stuck with.
    but thank you

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    Re: integration help!

    Oh. Just expand the integrand then.

    You'll get , and then the integration should be easy.
    HSC 2018: [English Adv.] • [Maths Ext. 1] • [Maths Ext. 2] • [Chemistry] • [Software Design]

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    Re: integration help!

    Well anyway
    My wrking is not 2u but if u r interested in the working out here it is :

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    Re: integration help!

    hey, what textbook did you get this question from

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