Question 207818
Do you mean {{{root(3,9x^2y^3) }}}???   Or do you mean {{{3*sqrt(9x^2y^3) }}} ??


If it is the first, then the answer is {{{y*root(3,9x^2)}}}.


If it is the second, then it is 
{{{3*sqrt(9x^2y^3) }}} 
{{{3*sqrt(9x^2y^2)*sqrt(y) }}}
{{{3*3xy*sqrt(y) }}} 
{{{9xy*sqrt(y) }}} 


R^2