| $$ \begin{aligned}0.1672-0.1215i& \xlongequal{ }0.1672-0i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}0\end{aligned} $$ | |
| ① | Combine like terms: $$ 0 = 0 $$ |