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    Rogers08's Avatar
    Rogers08 Posts: 1, Reputation: 1
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    #1

    Feb 14, 2008, 04:46 PM
    Rational zero theorem
    I can use the Rational Zero Theorem to solve problems, all the way to the last part of the problem... ex: (x-1)(x^2+6x+5), your choices are to use the quadratic formula, reverse foil or set to zero... but I don't know how to get the answer!
    iamthetman's Avatar
    iamthetman Posts: 105, Reputation: 8
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    #2

    Feb 15, 2008, 02:05 PM
    Quote Originally Posted by Rogers08
    I can use the Rational Zero Theorem to solve problems, all the way to the last part of the problem... ex: (x-1)(x^2+6x+5), your choices are to use the quadratic formula, reverse foil or set to zero... but I dont know how to get the answer!
    (x-1)(x^2+6x+5)
    =(x-1)(x+1)(x+5)

    So x = 1, -1 or -5 since one of these three parts has to be zero.
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