Question

f(x)=x^2+3; g(x)=x+4
find (fog)(-2)

Answer 1

fg(-2)
f(x+4)
f(-2+4)
f(2)
x^2+3
(2)^2+3
4+3
7

Answer 2

which answer would it be; 2,7,39,-7
this one really confused me:)

Answer 3

7

Answer 4

f o g means f(g(x))
That means that you have to solve g(x) first then put that answer into f(x)
so your question was f o g(-2)
or f(g(-2))
so first you plug -2 into g(x)
x+4
-2+4
2
So you get an answer of 2 which you then plug into f(x)
\[x^{2}+3\]
\[2^{2}+3\]
4+3
7
So your answer is 7.