Question

If f(x) = x2 + x and g(x) = x − 3, find f(g(7)).
A.) 20
B.) 28
C.) 32
D.) 53

Answer 1

The first one is the correct one.

Answer 2

Answer:

A. 20

Step-by-step explanation:

We are given,

The function $f(x)=x^2+x$ and $g(x)=x-3$.

It is required to find $f(g(7))$.

Now, we have,

$f(g(x))=f(x-3)\\\\f(g(x))=(x-3)^2+(x-3)$

So, we get,

$f(g(7))=(7-3)^2+(7-3)\\\\f(g(7))=4^2+4\\\\f(g(7))=16+4\\\\f(g(7))=20$

Thus, the value of $f(g(7))$ is 20.

So, option A is correct.