| $$ \begin{aligned}x^2+12+32& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}x^2+44\end{aligned} $$ | |
| ① | Combine like terms: $$ x^2+ \color{blue}{12} + \color{blue}{32} = x^2+ \color{blue}{44} $$ |