What are the possible rational roots of #x^3-5x^2-4x+20=0# and then determine the rational roots?
The possible rational roots are
The possible rational roots are the factors of the constant
The rational roots of this particular function can be found by factoring.
Factor by grouping.
First, group the first two terms and the second two terms.
Factor out a GCF from each group.
Set each factor equal to zero and solve.