$$ \begin{aligned}-sqrt\cdot24-sqrt-108-sqrt\cdot81-sqrt-192& \xlongequal{ }-24qrst-qrst-108-81qrst-qrst-192 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-107qrst-300\end{aligned} $$ | |
① | Combine like terms: $$ \color{blue}{-24qrst} \color{red}{-qrst} \color{green}{-108} \color{orange}{-81qrst} \color{orange}{-qrst} \color{green}{-192} = \color{orange}{-107qrst} \color{green}{-300} $$ |