Answer:
Area = L^2 + 5L units^2
Step-by-step explanation:
Length = L
Width = L + 5 Because it is 4 longer than the length.
Area = W * L
Area = L * (L + 5)
Area = L^2 + 5L units^2
You can test it by substituting number in:
If the length is 4 and the width is 9 (4 + 5)
4 * 9 = 36 units^2
4^2 + 5 * 4 = 16 + 20 = 36 units^2