# How do you combine  (4 - 2i) + (12 + 7i)?

Dec 21, 2015

$16 + 5 i$

#### Explanation:

Combine like terms. This is just the same as $\left(4 - 2 x\right) + \left(12 + 7 x\right)$.

$\left(4 - 2 i\right) + \left(12 + 7 i\right)$

$= 4 - 2 i + 12 + 7 i$

$= \left(4 + 12\right) + \left(- 2 i + 7 i\right)$

$= 16 + 5 i$