Respuesta :

When it states f(3) you’re substituting x value for 3 so your answer would be
f(3) = (3+2)^2
3+2= 5
5^2 = 25

Answer:

f(x)= (x+2)²

= x²+4+2x

then f(3) = 3²+4+2*3

= 9+4+6

add up the sum and here's your ans