Question
Answer
$$-(-99+i)=-i+99$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-(-99+i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}99-i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-i+99\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left(-99+i \right) = 99-i $$ |
| ② | Combine like terms: $$ -i+99 = -i+99 $$ |
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