Help plz?!?!

Given the following functions f(x) and g(x), solve (f ⋅ g)(3) and select the correct answer below:
f(x) = 4x^2 + 12
g(x) = x − 1

A) 47
B)−47
C)96
D)−96

Question

Help plz?!?!

Given the following functions f(x) and g(x), solve (f ⋅ g)(3) and select the correct answer below:
f(x) = 4x^2 + 12
g(x) = x − 1

A) 47
 B)−47
 C)96
 D)−96

iwik · Answer

@stefancipe can u help plz

anonymous · Answer

i'm sorry, but this is the first time seeing f*g, or is that f○g?

iwik · Answer

its f*g

anonymous · Answer

maybe change x in both f and g  with 3 and then multiply them?

anonymous · Answer

i'll try to help you, just wait for me to find formula for multiplication :)

iwik · Answer

ok

anonymous · Answer

ok, found the solution :)
try changing x in both f and g with, 3, what do you get?

iwik · Answer

like this?
f(3) = 4*3^2 + 12
g(3) = 3 − 1

anonymous · Answer

so the f = 4*9+12 = 48
and g =2, 
then f*g equals?

iwik · Answer

-96 so D?
(sry slow connection)

anonymous · Answer

wait a sec, how did you get minus?

iwik · Answer

wait 96 so its c?

iwik · Answer

am i Right?

anonymous · Answer

yes you are right

anonymous · Answer

well done