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    kmekme100's Avatar
    kmekme100 Posts: 1, Reputation: 1
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    #1

    Oct 4, 2009, 03:13 PM
    factoring quartic functions
    factor fully

    f(x) = x^4 - 5x^2 + 4
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Oct 4, 2009, 05:05 PM
    Let

    Then, we get

    Now, factor the quadratic and resub.



    Since , resub:



    Note the difference of two squares in both.


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