Question

qual a raiz quadrada de 81?​

Answer 1

$\large\boxed{\begin{array}{l}\begin{array}{c|c}\rm81&\rm3\\\rm27&\rm3\\\rm9&\rm3\\\rm3&\rm3\\\rm1\end{array}\\\rm 81=3^2\cdot3^2\\\rm\sqrt{81}=\sqrt{3^2\cdot3^2}=3\cdot3=9\end{array}}$

Answer 2

Raiz quadrada por fatoração

$\begin{array}{r|l}\sf81&\sf3\\\sf27&\sf3\\\sf9&\sf3\\\sf3&\sf3\\\sf1\end{array}$

$\mathsf{ \sqrt{81}=\sqrt{3^2\cdot3^2}}$

$\mathsf{\sqrt{81}=3\cdot3 }$

$\boxed{\boxed{\mathsf{\sqrt{81}=9 }}}$