posted by michelle .
use the rational zeros theorem to find all the real zeros of the polynomial function. use the zeros to factor f over the real numbers:
I am totally lost, please help?
pre calculus -
all the rational possibilities are
That's a lot, but it's easy to check the small values. A little synthetic division shows that
f(x) = (x-1)(x^3+3x^2-4x-12)