Question
Answer
$$5-6i-(7+4i)=-10i-2$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}5-6i-(7+4i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}5-6i-7-4i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-10i-2\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 7+4i \right) = -7-4i $$ |
| ② | Combine like terms: $$ \color{blue}{5} \color{red}{-6i} \color{blue}{-7} \color{red}{-4i} = \color{red}{-10i} \color{blue}{-2} $$ |
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