# How do you simplify (10-2i)+(-11-7i)?

Jul 28, 2018

$- 1 - 9 i$

#### Explanation:

$\text{simplify by collecting like terms}$

$= 10 - 2 i - 11 - 7 i$

$= \left(10 - 11\right) + \left(- 2 i - 7 i\right)$

$= - 1 - 9 i$

Jul 28, 2018

$- 1 - 9 i$

#### Explanation:

For the most part, even though it isn't, we can treat the imaginary unit like it is a variable. We have

$10 - 2 i - 11 - 7 i$

We combine the constants and the imaginary terms respectively to get

$- 1 - 9 i$

Hope this helps!