Question
Answer
$$9+5i-(8-10i)=15i+1$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}9+5i-(8-10i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}9+5i-8+10i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}15i+1\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 8-10i \right) = -8+10i $$ |
| ② | Combine like terms: $$ \color{blue}{9} + \color{red}{5i} \color{blue}{-8} + \color{red}{10i} = \color{red}{15i} + \color{blue}{1} $$ |
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