Please help me (find all the real zero of x^3-3x^2-2x+4)

also (multiplicity - f(x)=(x-4)^3(x-2)(x+17)^3(x^2-4) long division - x^3+2x^2-5x-6 by x^2+3x-1) Determine the possible rational zeo of (2x^3+6x^2-x-30)"

This has three real zero's at x = 1, x = 1 ± √5