Question

A rectangular box is twice as long as it is wide. The height of the box is 3 feet less than the width. If the box is x feet wide, what polynomial represents its volume in cubic feet?

Answer 1

Write an expression for the length and height in terms of x, the width:
Length = ? x
Height = x - ?
For the volume, multiply the width, length and height:
x ( ? x) ( x - ? )