Question

Perform the given operations on the functions

21) f(x)=x² + 3x, g(x) = 2x + 2,
A. (f+g)(x)
B. (f- g)(x)

Answer 1

see explanation

Explanation:

A

(f + g)(x)

= f(x) + g(x)

= x² + 3x + 2x + 2 ← collect like terms

= x² + 5x + 2

B

(f - g)(x)

= x² + 3x - (2x + 2)

= x² + 3x - 2x - 2 ← collect like terms

= x² + x - 2