Help me on this math questionnn

Create a real-life situation and create a system and show how it might be modeled algebraically with a system of equations (or inequalities) show all work include a few sentences explaining the situation, your variables of choice and what each represents, and how you would set it up and solve it algebraically. !

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

Im literally having a mental breakdown