Question
Answer
$$11-2i-(9-8i)=6i+2$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}11-2i-(9-8i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}11-2i-9+8i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}6i+2\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 9-8i \right) = -9+8i $$ |
| ② | Combine like terms: $$ \color{blue}{11} \color{red}{-2i} \color{blue}{-9} + \color{red}{8i} = \color{red}{6i} + \color{blue}{2} $$ |
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