Question 701399
<pre>
simplify {{{ sqrt(45)-10/sqrt(5) }}}
====================================
The other person's answer, 15, is WRONG!!

{{{sqrt(45) - 10/sqrt(5)}}} = {{{(sqrt(45)*sqrt(5))/sqrt(5) - 10/sqrt(5)}}} = {{{(sqrt(9 * 5)sqrt(5) - 10)/sqrt(5)}}} = {{{(sqrt(9)sqrt(5)sqrt(5) - 10)/sqrt(5)}}} = {{{(3(5) - 10)/sqrt(5)}}} = {{{(15 - 10)/sqrt(5)}}} = {{{5/sqrt(5)}}} = {{{(5/sqrt(5))(sqrt(5)/sqrt(5))}}} = {{{5sqrt(5)/5}}} = {{{cross(5)sqrt(5)/cross(5)}}} = {{{highlight(sqrt(5))}}}</pre>