Question
Answer
$$-3+i-(1+10i)=-9i-4$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-3+i-(1+10i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-3+i-1-10i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-9i-4\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 1+10i \right) = -1-10i $$ |
| ② | Combine like terms: $$ \color{blue}{-3} + \color{red}{i} \color{blue}{-1} \color{red}{-10i} = \color{red}{-9i} \color{blue}{-4} $$ |
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