| $$ \begin{aligned}5\sqrt{2695}\sqrt{5005}& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}1925\sqrt{91}\end{aligned} $$ | |
| ① | $$ 5 \sqrt{13488475} =
5 \sqrt{ 385 ^2 \cdot 91 } =
5 \sqrt{ 385 ^2 } \, \sqrt{ 91 } =
5 \cdot 385 \sqrt{ 91 } =
1925 \sqrt{ 91 } $$ |