Question
Answer
$$-7+10i-(2i+8)=8i-15$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-7+10i-(2i+8)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-7+10i-2i-8 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}8i-15\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 2i+8 \right) = -2i-8 $$ |
| ② | Combine like terms: $$ \color{blue}{-7} + \color{red}{10i} \color{red}{-2i} \color{blue}{-8} = \color{red}{8i} \color{blue}{-15} $$ |
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