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