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Math Help - Polynomial factoring help

  1. #1
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    Polynomial factoring help

    argh this isn't a polynomial my bad, I think I should look in the previous chapters notes because I forgot all about these. :s

    Hey, I came across an odd problem in factoring polynomials on my hw today. I don't remember covering it in class, and when checking the answer in the back of my book, I was wrong, but I'm not sure how, exactly...

    problem:

    m^4-256

    my answer:

    (m^2-16)(m^2+16)

    books answer:

    (m^2+16)(m+4)(m-4)


    I don't see how my answer is wrong...if anybody could tell me why it's wrong, I would appreciate the help.
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  2. #2
    Member great_math's Avatar
    Joined
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    Quote Originally Posted by ohiostatefan View Post
    argh this isn't a polynomial my bad, I think I should look in the previous chapters notes because I forgot all about these. :s

    Hey, I came across an odd problem in factoring polynomials on my hw today. I don't remember covering it in class, and when checking the answer in the back of my book, I was wrong, but I'm not sure how, exactly...

    problem:

    m^4-256

    my answer:

    (m^2-16)(m^2+16)

    books answer:

    (m^2+16)(m+4)(m-4)


    I don't see how my answer is wrong...if anybody could tell me why it's wrong, I would appreciate the help.
    (m^2-16)(m^2+16)

    m^2-16=(m+4)(m-4)

    (m^2-16)(m^2+16)=(m^2+16)(m+4)(m-4)

    The book gave the answer after complete factorization. But you both are correct
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  3. #3
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    Joined
    Jun 2009
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    Ah I see it now...Thanks I appreciate the help. I was so confused lol :/
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