Question

If f(x)=2x+1 and g(x)=x^2+7, which of the following is equal to f(g(x))

Answer 1

Answer: $2x^{2} +15$

Explanation:

so basically f(g(x)) is telling you to plug the entire g(x) equation into x in the f(x) equation so it will look like this

2($x^{2} +7$) + 1

and then simplify

$2x^{2} +14 + 1$

$2x^{2} +15$

Answer 2

2x exponent 2 • 15
Because