# If g(x)=x^2+3, how do you find g (4)?

Nov 16, 2016

$g \left(4\right) = 19$

#### Explanation:

$g \left(x\right) = {x}^{2} + 3$

$g \left(4\right) = {\left(4\right)}^{2} + 3$ : Substitute 4 in for x.

$g \left(4\right) = 16 + 3$ : ${4}^{2} = 16$

$g \left(4\right) = 19$ : $16 + 3 = 19$

Nov 16, 2016

Given $g \left(x\right) = {x}^{2} + 3$, $g \left(4\right) = 19$.

#### Explanation:

To find $g \left(4\right)$, substitute $4$ for $x$ in the function.

$g \left(x\right) = {x}^{2} + 3$
$g \left(4\right) = {\left(4\right)}^{2} + 3$
$g \left(4\right) = 16 + 3$
$g \left(4\right) = 19$