1. The formula for calculate the volume of the box is shown in the problem:
V=lwh
V is the volumen of the box.
l is the length of the box.
w is the widht of the box.
2. When you substitute the values shown in the figure attached, into the formula V=lwh, you obtain:
V=(2x-1)(x+2)(3x+1)
3. You must apply the "Distributive property". Then, you have:
V=6x³+11x²-3x-2
Which expression represents the volume of the box?
The second expression, which is: 6x³+11x²-3x-2