problem: 4x^3-24x

would this be the answer to the problem?

4x(x^2-6)

2 answers

yes
4x^3-24x
4x (x^2 - 6)= 0

4x = 0
x = 0

x^2 - 6 = 0
x^2 = 6
x = +- sqrt(6)

x = 0, x = +- sqrt(6)