SOLUTION: The height of a garage door measures four feet less than the door’s width. The area of the garage door is 165 square feet. Determine the height and width of the garage door.
The answer is 11 ft for the width and 15 ft for the height.
It can be easily guessed MENTALLY, or obtained from the solution
of this quadratic equation
x*(x-4) = 165,
where x is the width of the garage door.