Question

F(a)=a2+3and g(a)=3a-1, which of the following is an expression for g(f(a)

Answer 1

So for this expression, you are plugging the value of f(a) into the a variable of g(a).

`g(f(a))=3(a^2+3)-1`

Firstly, distribute 3 to (a^2 + 3):

`g(f(a))=3a^2+9-1`

Next, combine like terms and your answer will be:

`g(f(a))=3a^2+8`