Question
Answer
$$9+3i+1-3i=10$$
Explanation
| $$ \begin{aligned}9+3i+1-3i& \xlongequal{ }9+ \cancel{3i}+1 -\cancel{3i} \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}10\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{9} + \, \color{red}{ \cancel{3i}} \,+ \color{blue}{1} \, \color{red}{ -\cancel{3i}} \, = \color{blue}{10} $$ |
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