Question
Answer
$$5-5i-(4+4i)=-9i+1$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}5-5i-(4+4i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}5-5i-4-4i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-9i+1\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 4+4i \right) = -4-4i $$ |
| ② | Combine like terms: $$ \color{blue}{5} \color{red}{-5i} \color{blue}{-4} \color{red}{-4i} = \color{red}{-9i} + \color{blue}{1} $$ |
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