Question
Answer
$$-(8-9i)+4-10i=-i-4$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-(8-9i)+4-10i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-8+9i+4-10i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-i-4\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left(8-9i \right) = -8+9i $$ |
| ② | Combine like terms: $$ \color{blue}{-8} + \color{red}{9i} + \color{blue}{4} \color{red}{-10i} = \color{red}{-i} \color{blue}{-4} $$ |
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