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!

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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!

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(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.