Question

$frac{3}{ sqrt{2} -1} - sqrt{18}$=?

Answer 1

$3/( sqrt{2}-1 )- sqrt{18}=3( sqrt{2}+1 )/( sqrt{2}-1 )( sqrt{2}+1 )- 3sqrt{2}=$
$3 sqrt{2} +3-3 sqrt{2}=3$