Question
Answer
$$13-5i-(7-11i)=6i+6$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}13-5i-(7-11i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}13-5i-7+11i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}6i+6\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 7-11i \right) = -7+11i $$ |
| ② | Combine like terms: $$ \color{blue}{13} \color{red}{-5i} \color{blue}{-7} + \color{red}{11i} = \color{red}{6i} + \color{blue}{6} $$ |
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