Respuesta :

Blacklash

Answer:

gof(x) = x²+8x+15

Step-by-step explanation:

gof(x) = g(f(x))

f(x) = x + 4 and g(x)=x²-1

Substituting

     gof(x) = g(f(x)) = g(x + 4) = (x+4)²-1

       gof(x) = x²+8x+16 -1 = x²+8x+15

That is if f(x) = x + 4 and g(x)=x²-1, gof(x) = x²+8x+15

Answer:

c

Step-by-step explanation: