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!

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.