$$ \begin{aligned}-0.0015x^2+0.052x+1.2303& \xlongequal{ }-0x^2+0x+1.2303 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}1\end{aligned} $$ | |
① | Combine like terms: $$ 1 = 1 $$ |