Question

If f(x) = 3x^2 – 2 and g(x) = 2x + 4, find (f- g)(x).

Answer 1

Answer:

(f - g)(x) = 3x² - 2x - 6

General Formulas and Concepts:

Pre-Alg

• Order of Operations: BPEMDAS

Step-by-step explanation:

Step 1: Define

f(x) = 3x² - 2

g(x) = 2x + 4

(f - g)(x) is f(x) - g(x)

Step 2: Evaluate

1. Substitute:                    (f - g)(x) = 3x² - 2 - (2x + 4)
2. Distribute -1:                 (f - g)(x) = 3x² - 2 - 2x - 4
3. Combine like terms:    (f - g)(x) = 3x² - 2x - 6