Question

efetue :: √50 + √98 - √72

Answer 1

.
$\sqrt{50} + \sqrt{98} - \sqrt{72} = \\ \\ \sqrt{2.5^2} + \sqrt{2.7^2} - \sqrt{2^2.2.3^2} = \\ \\ 5 \sqrt{2} +7 \sqrt{2} -2.3 \sqrt{2} = \\ \\ 12 \sqrt{2} -6 \sqrt{2} =6 \sqrt{2}$

Answer 2

√50 + √98 - √72    
√2.5² + √2. 7²   -  √2.6²

Podemos cortar os expoentes ²
 
 5√2 + 7√2 - 6√2

Podemos cortar as raízes

5+7-6
12-6
  6