Question 434125
The volume of the prism is the length x width x height
So the volume is:
(x+2)(x-2)(x+1)
The first 2 terms can be expressed as the difference of two squares, so we have:
{{{(x^2-4)(x+1)}}}
Multiply using FOIL:
{{{(x^2-4)(x+1) = x^3 + x^2 - 4x - 4}}}