Respuesta :

Answer: 15

Step-by-step explanation:

f(x) = x² + 5x - 9

f(3) = (3)² + 5(3) - 9

    =  9  + 15 - 9

    = 15

Answer:

15

Step-by-step explanation:

(x) = x² + 5x - 9

f(3) = (3)² + 5(3) - 9

   =  9  + 15 - 9

   = 15