f(x) * g(x) = 4 (x² + 5x + 6)
Step-by-step explanation:
f(x) * g(x) = (4x + 8) (x + 3)
= 4x² + 12x + 8x + 24
= 4x² + 20x + 24
= 4 (x² + 5x + 6)