Answer:
The answer to your question is Area = (x + 25)(x + 15) - 30
Step-by-step explanation:
Data
Patio bench
base = x + 25 base = 10
height = x + 15 height = 3
Process
1.- Calculate the area of the patio considering the bench
Area 1 = (x + 25)(x + 15)
2.- Calcula the area of the bench
Area 2 = 10 x 3 = 30
3.- Calculate the area of the patio
Area = Area 1 - Area 2
-Substitution
Area = (x + 25)(x + 15) - 30