Question
Answer
$$-(-3+6i)+5i-9=-i-6$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-(-3+6i)+5i-9& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3-6i+5i-9 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-i-6\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left(-3+6i \right) = 3-6i $$ |
| ② | Combine like terms: $$ \color{blue}{3} \color{red}{-6i} + \color{red}{5i} \color{blue}{-9} = \color{red}{-i} \color{blue}{-6} $$ |
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