Question

if f(x) = x^2+3x+5 what is f(3+h)

Answer 1

this means that wherever you see an x you will plug in 3 + h ,
example ( 3 + h ) ^2 + 3 ( 3 + h ) + 5 ,

Answer 2

I got 9+3h+3h+h^2+9+3h+5

Answer 3

is the final answer h^2 + 9h + 23