$$ \begin{aligned}5\sqrt{196}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}5\cdot14 \xlongequal{ } \\[1 em] & \xlongequal{ }70\end{aligned} $$ | |
① | The square root of $ 196 $ is $ 14 $. |