# If g(x) = 9x^2+3x how do you find g(-3)?

May 18, 2018

$= 72$

#### Explanation:

We have to put $- 3$ in place of $x$. Given

$g \left(x\right) = 9 {x}^{2} + 3 x$

Putting $g = - 3$

$g \left(- 3\right) = 9 {\left(- 3\right)}^{2} + 3 \left(- 3\right)$

$= 81 - 9$

$= 72$