Answer
$$-9-8i-(2+8i)=-16i-11$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-9-8i-(2+8i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-9-8i-2-8i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-16i-11\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 2+8i \right) = -2-8i $$ |
| ② | Combine like terms: $$ \color{blue}{-9} \color{red}{-8i} \color{blue}{-2} \color{red}{-8i} = \color{red}{-16i} \color{blue}{-11} $$ |
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