$$ \begin{aligned}3-4i+2+5i& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}i+5\end{aligned} $$ | |
① | Combine like terms: $$ \color{blue}{3} \color{red}{-4i} + \color{blue}{2} + \color{red}{5i} = \color{red}{i} + \color{blue}{5} $$ |