Question
Answer
$$6i-12-(2i+7)=4i-19$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}6i-12-(2i+7)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}6i-12-2i-7 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}4i-19\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 2i+7 \right) = -2i-7 $$ |
| ② | Combine like terms: $$ \color{blue}{6i} \color{red}{-12} \color{blue}{-2i} \color{red}{-7} = \color{blue}{4i} \color{red}{-19} $$ |
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