Answer:
y² + 18y + 81
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Algebra I
- Terms/Coefficients
- Expand by FOIL (First Outside Inside Last)
Explanation:
Step 1: Define
(y + 9)(y + 9)
Step 2: Expand
- FOIL: y² + 9y + 9y + 81
- Combine like terms: y² + 18y + 81