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