Question

Qual a raiz quadrada de 280?

Answer 1

$\sqrt{280} = \sqrt{4.70} = 2 \sqrt{70}$

Answer 2

280 | 2
140 | 2
  70 | 2
  35 | 5
    7 | 7
    1 | 

√280 = √ 2 x 2 x 2 x 5 x 7 

√ 4 x 2 x 5 x 7 = √ 4 x 70 = √4 . √70 = 2√70