SOLUTION: The length of a rectangular backyard is 13 feet longer than its width (x). What is the area of the backyard in terms of x?

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Question 873346: The length of a rectangular backyard is 13 feet longer than its width (x). What is the area of the backyard in terms of x?
Answer by harpazo(655) About Me  (Show Source):
You can put this solution on YOUR website!
Let A(x) = the area of the rectangle in terms of x.
Area = length times width
Length = x + 13
Width = x
Area = (x+13)(x)
Area = x^2 + 13x
A(x) = x^2 + 13x