Let f(x)= $x^2+2$ and g(x)=2x−2, evaluate: f(g(3))?

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Answer 1 · 2018-02-27T00:34:04

$18$

$g(3)$ means you plug $3$ into the $g(x)$ function, which results in:

$g(3)=2(3)-2 = 4$

With this information, you plug the $4$ into your $f(x)$ function:

$f(g(3))=(4)^2 + 2 = 18$

Let f(x)=x^2+2x^2+2 and g(x)=2x−2, evaluate: f(g(3))?