Answer:
- 22
Step-by-step explanation:
(g - f)(- 4) , means evaluate g(x) - f(x) when x = - 4
g(x) - f(x)
= 3x + 3 - (x² - 3) ← distribute by - 1
= 3x + 3 - x² + 3 ← collect like terms
= 3x - x² + 6 ← substitute x = - 4 into expression and evaluate
= 3(- 4) - (- 4)² + 6
= - 12 - 16 + 6 = - 28 + 6 = - 22
