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Math Help - Decide the coefficient

  1. #1
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    Decide the coefficient

    Correction:

    Decide the coefficient before x and x^3 when (x^2+7x+7)(x^3−5x+3x) develops.

    Last edited by grabben; June 6th 2012 at 07:43 PM.
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  2. #2
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    Re: Decide the coefficient

    Correction:

    Decide the coefficient before x and x^3 when (x^2+7x+7)(x^3−5x+3x) develops.
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  3. #3
    Junior Member Sarasij's Avatar
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    Re: Decide the coefficient

    Quote Originally Posted by grabben View Post
    Correction:

    Decide the coefficient before x and x^3 when (x^2+7x+7)(x^3−5x+3x) develops.
    Firstly, what do you mean by the term "develops"? If its multiplication then
    multiply the factors yourself to get the answers. This is pretty much basic algebra. The only thing you have to watch here is that when the terms x3 and x comes while doing the multiplication.

    I can show you the way only.

    (x^2+7x+7)(x^3-5x+3x)
    =(x^2+7x+7)(x^3-2x)
    =x^2(x^3-2x)+7x(x^3-2x)+7(x^3-2x)

    Now can you do it ?
    Last edited by Sarasij; June 6th 2012 at 09:40 PM.
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