Question

qual é a raiz quadrada de 400

Answer 1

400 / 2
200 / 2
100 / 2
050 / 2
025 / 5
005 / 5
001

$\sqrt{400} = \sqrt{2^2*2^2*5^2} = 2 * 2 * 5 = 20$

Pois 20 * 20 = 400

Answer 2

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

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

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

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