Question
Answer
$$9i-(2+3i)=6i-2$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}9i-(2+3i)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}9i-2-3i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}6i-2\end{aligned} $$ | |
| ① | Remove the parentheses by changing the sign of each term within them. $$ - \left( 2+3i \right) = -2-3i $$ |
| ② | Combine like terms: $$ \color{blue}{9i} -2 \color{blue}{-3i} = \color{blue}{6i} -2 $$ |
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