Question 826060
{{{a/(sqrt(10)+sqrt(2))}}} or did you want {{{a/sqrt(10)+sqrt(2)}}}?


If the first one, take advantage of the Difference Of Squares.
{{{(a/(sqrt(10)+sqrt(2)))((sqrt(10)-sqrt(2))/(sqrt(10)-sqrt(2)))}}}
{{{(a*sqrt(10)-a*sqrt(2))/(10+2)}}}, a step was skipped, expecting you recognize the step;