The expression V = 2x3 + 6x2 can be used to find the volume of the trapezoidal prism below.
A trapezoidal prism is shown. The bases of the trapezoid have lengths of x + 2 and x + 4. The height of the trapezoid is x. The height of the prism is 2 x.
If x = 12 cm, what is the volume of the prism?