# How do you simplify -12+(-9-6i)+(1-4i)?

The simplified expression is $- 20 - 10 i$.
$- 12 + \left(- 9 - 6 i\right) + \left(1 - 4 i\right)$
$\left(- 12 - 9 + 1\right) + \left(- 6 i - 4 i\right)$
$- 20 - 10 i$