Question

qual e a raiz quadrada de 400 e 169

Answer 1

$\sqrt{400} = 20 \sqrt{169} = 13$

Answer 2

400 | 2
200 | 2
100 | 2
  50 | 2
  25 | 5
    5 | 5
    1 | 

√400 = √2 x 2 x 2 x 2 x 5 x 5
√400 = √4 x √4 x √25
√400 = 2 x 2 x 5
√400 = 20

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169 | 13
  13 | 13
    1 | 

√169 = √13 x 13 (quadrado perfeito)
√169 = 13