Answer:
f(2) = 9
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS 
- Brackets 
- Parenthesis 
- Exponents 
- Multiplication 
- Division 
- Addition 
- Subtraction 
Algebra I
Explanation:
Step 1: Define
f(x) = (x + 1)²
f(2) is x = 2
Step 2: Evaluate
- Substitute in x: f(2) = (2 + 1)²
- (Parenthesis) Add: f(2) = 3²
- Exponents: f(2) = 9