Respuesta :

Space

Answer:

A. -x² + 2x + 8

General Formulas and Concepts:

Algebra I

  • Combining like terms

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

  1. Substitute:                    (f - g)(x) = 2x + 1 - (x² - 7)
  2. Distribute -1:                 (f - g)(x) = 2x + 1 - x² + 7
  3. Combine like terms:    (f - g)(x) = -x² + 2x + 8