How do you use the rational roots theorem to find all possible zeros of #x^3-x^2-4x+4#?
(see below for use of the Rational Root Theorem)
The Rational Root Theorem tells us that the rational zeros of
are the factors of
Checking each of the possible factors we get:
which gives us zeros for
#x=-2, x=1, and x=2#
it can have a maximum of
and we have found them all.