Factor the polynomial f(x) = x-3x-9x+27 and find all its real zeros using the Zero Product Property. f(x)=(x-3) real zero at x=3 (multiplicity 2) f(x) = (x-3)3 real zeros at x=3 (multiplicity 3) f(z) = (x-3)2(x+3) real zeros at x=-3.3 (multiplicity 2) f(x)=(x-3)(x+3)(x-2) real zeros at x=-3,3