Question
Answer
$$1-i-1+3i=2i$$
Explanation
| $$ \begin{aligned}1-i-1+3i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}2i\end{aligned} $$ | |
| ① | Combine like terms: $$ \, \color{blue}{ \cancel{1}} \, \color{green}{-i} \, \color{blue}{ -\cancel{1}} \,+ \color{green}{3i} = \color{green}{2i} $$ |
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