Question

POMOGITE!!!$frac{7-sqrt{7} }{sqrt{7} }$
$frac{7-sqrt{7} }{sqrt{7} }$
$frac{7-sqrt{7} }{sqrt{7} }$
$frac{7-sqrt{7} }{sqrt{7} }$
$frac{7-sqrt{7} }{sqrt{7} }$

Answer 1

$frac{7-sqrt7}{sqrt7}=frac{sqrt7cdot sqrt7-sqrt7}{sqrt7}=frac{sqrt7cdot (sqrt7-1)}{sqrt7}=sqrt7-1$