Sam needs to fill up a box with packaging material. Use the Figures below to calculate the volume of the box.
Length=2x+3
width=x+2
ht=x-3
(2x+3)(x+2) = (2 x^2 + 7 x + 6)
now use distributive property to multiply that by (x-3)
x (2 x^2 + 7 x + 6) = 2 x^3 + 7 x^2 + 6 x
-3(2 x^2 + 7 x + 6) =-6 x^2 -21 x -18
add and get sum = 2 x^3 + x^2 -15 x -18