Question 256651
Here is the question:
{{{sqrt( 4 / 5)}}}
We are allowed to split the sqrt as
{{{sqrt(4) / sqrt(5)}}}
Now sqrt(4) = 2, so , we get
{{{2/sqrt(5)}}}
but we don't like sqrt's in the denominator, so, we rationalize by multiplying by sqrt(5) on top and bottom as
{{{(2*sqrt(5))}}} / {{{sqrt(5)*sqrt(5))}}}
and then
{{{2sqrt(5)/5}}}