Question

What is (f - g)(x)?
f(x) = 4x + 4
g(x) = x² - 4x

Answer 1

(f - g)(x) = - x² + 8x + 4

Explanation:

(f - g)(x)

= f(x) - g(x)

= 4x + 4 - (x² - 4x) ← distribute parenthesis by - 1

= 4x + 4 - x² + 4x ← collect like terms

= - x² + 8x + 4