Answer:
The answer is
6 feet
Step-by-step explanation:
Area of a rectangle = l × w
where
l is the length of the rectangle
w is the width
Area = 18 ft²
the width is 3 feet shorter than the length is written as
w = l - 3
Substitute it into the above equation
18 = l( l - 3)
l² - 3l - 18 = 0
( l + 3)( l - 6 ) = 0
l + 3 = 0 l - 6 = 0
l = - 3 l = 6
Since the length is positive, the length of the rectangle is 6 feet
Hope this helps you
