Question

which expression represents the volume of the box use the formula v=lwh

1. 6x^2-x-1
2. 6x^3 - 2
3. 6x^3 + 11x^2 - 3x - 2
4. 6x^2 - 13x^2 - 3x - 2

Answer 1

The volume is the product of the 3 dimensions
= (x + 2)(2x - 1)(3x + 1)

= (x + 2)(6x^2 -x - 1)
= 6x^3 - x^2 - x + 12x^2 -2x - 2
= 6x^3 + 11x^2 - 3x - 2   Answer

Its  choice 3.

Answer 2

3. 6x^3 + 11x^2 - 3x - 2