Question

Racionalize:

$\frac{2}{ \sqrt{7} }$

Answer 1

racionalizar

$\frac{2}{ \sqrt{7} } = \frac{2. \sqrt{7} }{ \sqrt{7}. \sqrt{7} } = \frac{2 \sqrt{7} }{ \sqrt{7^2} } = \frac{2 \sqrt{7} }{7}$

Answer 2

$\frac{2}{ \sqrt{7 } } = \frac{2}{ \sqrt{7} } . \frac{ \sqrt{7} }{ \sqrt{7} } = \frac{2 \sqrt{7} }{( \sqrt{7) {}^{2} } } = \frac{2 \sqrt{7} }{7}$