Question

Calcule:

$3\cdot\sqrt\frac{1}{49}-\sqrt{\frac{4}{49}}$

Answer 1

Olá,

$3 \times \sqrt{ \frac{1}{49} } - \sqrt{ \frac{4}{49} } \\ \\ 3 \times \frac{1}{7} - \frac{2}{7} \\ \\ \frac{3}{7} - \frac{2}{7} \\ \\ \frac{1}{7}$