Answer:
A. -x² + 2x + 8
General Formulas and Concepts:
Algebra I
Step-by-step explanation:
Step 1: Define
f(x) = 2x + 1
g(x) = x² - 7
(f - g)(x) is f(x) - g(x)
Step 2: Solve
- Substitute: (f - g)(x) = 2x + 1 - (x² - 7)
- Distribute -1: (f - g)(x) = 2x + 1 - x² + 7
- Combine like terms: (f - g)(x) = -x² + 2x + 8
