# Given f (x) = 2x + 5; g (x) = 3x^2, what is equal to (f o g) (x)?

$6 {x}^{2} + 5$
To find f(g(x)) substitute x $= 3 {x}^{2} \text{ the value of g(x)}$ into f(x)
$\Rightarrow f \left(g \left(x\right)\right) = f \left(3 {x}^{2}\right) = 2 \left(3 {x}^{2}\right) + 5 = 6 {x}^{2} + 5$