Question

raiz quadrada de 400​

Answer 1

raiz quadrada de 400 é 20
20.20 = 400

Answer 2

$\begin{array}{c|c}\sf400&\sf2\\\sf200&\sf2\\\sf100&\sf2\\\sf50&\sf2\\\sf25&\sf5\\\sf5&\sf5\\\sf1\end{array}$

$\sf\sqrt{400}=\sqrt{2^2\cdot2^2\cdot5^2}$

$\sf\sqrt{400}=2\cdot2\cdot5$

$\boxed{\boxed{\sf \sqrt{400}=20}}$