Question
Answer
$$-(10-8i)-3i-5=5i-15$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-(10-8i)-3i-5& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-10+8i-3i-5 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}5i-15\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left(10-8i \right) = -10+8i $$ |
| ② | Combine like terms: $$ \color{blue}{-10} + \color{red}{8i} \color{red}{-3i} \color{blue}{-5} = \color{red}{5i} \color{blue}{-15} $$ |
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