$$ \begin{aligned}5i+6sqrt-243+17& \xlongequal{ }5i+6qrst-243+17 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}6qrst+5i-226\end{aligned} $$ | |
① | Combine like terms: $$ 5i+6qrst \color{blue}{-243} + \color{blue}{17} = 6qrst+5i \color{blue}{-226} $$ |