Question
Answer
$$-(-2+5i)-10-7i=-12i-8$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-(-2+5i)-10-7i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2-5i-10-7i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-12i-8\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left(-2+5i \right) = 2-5i $$ |
| ② | Combine like terms: $$ \color{blue}{2} \color{red}{-5i} \color{blue}{-10} \color{red}{-7i} = \color{red}{-12i} \color{blue}{-8} $$ |
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