Question
Answer
$$12-3i+7+3i=19$$
Explanation
| $$ \begin{aligned}12-3i+7+3i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}19\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{12} \, \color{red}{ -\cancel{3i}} \,+ \color{blue}{7} + \, \color{red}{ \cancel{3i}} \, = \color{blue}{19} $$ |
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