Learn how to solve common monomial factor problems step by step online. Factor the expression y^3-4y^2-5y. We can factor the polynomial y^3-4y^2-5y using the rational root theorem, which guarantees that for a polynomial of the form a_nx^n+a_{n-1}x^{n-1}+\dots+a_0 there is a rational root of the form \pm\frac{p}{q}, where p belongs to the divisors of the constant term a_0, and q belongs to the divisors of the leading coefficient a_n. List all divisors p of the constant term a_0, which equals 0. Next, list all divisors of the leading coefficient a_n, which equals 1. The possible roots \pm\frac{p}{q} of the polynomial y^3-4y^2-5y will then be. We can factor the polynomial y^3-4y^2-5y using synthetic division (Ruffini's rule). We found that -1 is a root of the polynomial.

Factor the expression y^3-4y^2-5y