Respuesta :

Answer:

C) 288

Step-by-step explanation:

C) 288

F(x) = 12x2 + 8x

F(x) = 12×9×2 + 8(9)

F(x) = 216 + 72

F(x) = 288

Answer:

224

Step-by-step explanation:

f(x)f ′(x)f ′(9)=12x2+8x=24x+8=224