Question 610924
First, group the first two terms together, and the second two terms together.
{{{(x^3+3x^2)+(-8x-24)}}}
Then, we find the GCF of each group.
{{{(x^2(x+3)-8(x+3))}}}
Since both groups contain the same GCF, they can be combined into:
{{{(x^2-8)(x+3)}}}. There's your answer! :)