Exercise
$2x^3-2x^2-4x+16$
Step-by-step Solution
Learn how to solve common monomial factor problems step by step online. Factor the expression 2x^3-2x^2-4x+16. We can factor the polynomial 2x^3-2x^2-4x+16 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 16. Next, list all divisors of the leading coefficient a_n, which equals 2. The possible roots \pm\frac{p}{q} of the polynomial 2x^3-2x^2-4x+16 will then be. Trying all possible roots, we found that -2 is a root of the polynomial. When we evaluate it in the polynomial, it gives us 0 as a result.
Factor the expression 2x^3-2x^2-4x+16
Final answer to the exercise
$2\left(x^2-3x+4\right)\left(x+2\right)$