# How do you evaluate c + 2a^2 given a = 3 and c = −1?

Jun 22, 2018

$17$

#### Explanation:

We have all of the values we need, so let's just plug them in. We will get

$- 1 + 2 {\left(3\right)}^{2}$

Which simplifies to

$- 1 + 2 \left(9\right)$

$\implies - 1 + 18 = 18 - 1 = \textcolor{b l u e}{17}$

Hope this helps!