# How do you combine like terms of (9+ 3i ) - ( - 4- i )?

Dec 24, 2016

$13 + 4 i$

#### Explanation:

$\left(9 + 3 i\right) - \left(- 4 - i\right)$

Distribute the negative
$\left(9 + 3 i\right) + \left(4 + i\right)$

$13 + 3 i + i$
Combine $i$s
$13 + 4 i$