Question

a raiz quadrada de 20

Answer 1

2$\sqrt{5}$ ou 4,47...

Answer 2

√20 = √4.√5 = 2√5

20: 2
10: 2
5: 5
-----------
1    =   2².5 = √4.√5 = 2√5

Resp.: 2√5  ou ≈ 4,47.