| $$ \begin{aligned}53.0303-12.51i& \xlongequal{ }53.0303-12i \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-12i+53\end{aligned} $$ | |
| ① | Combine like terms: $$ -12i+53 = -12i+53 $$ |