| $$ \begin{aligned}1.7852386-0.9722531i& \xlongequal{ }1.7852386-0i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}1\end{aligned} $$ | |
| ① | Combine like terms: $$ 1 = 1 $$ |