Respuesta :

(f+g) (x)= f(x)+g(x)=8x²+16x+6 + x³−3x²−9 =x³ +5x² + 16x -3
(f+g) (x)= x³ +5x² + 16x -3

Answer:

x³ + 5x² + 16x - 3

This is the correct answer! I just took the test! Good luck!