$$ \begin{aligned}5^2+3k+4& \xlongequal{ }25+3k+4 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3k+29\end{aligned} $$ | |
① | Combine like terms: $$ \color{blue}{25} +3k+ \color{blue}{4} = 3k+ \color{blue}{29} $$ |