Question 405426
{{{sqrt(9x^2y)sqrt(3x^5y^2)}}}
You can combine all this under one radical
{{{sqrt(9x^2y*3x^5y^2)}}}
Combine like terms
{{{sqrt(27x^7*y^3)}}} 
factor to reveal more perfect squares
{{{sqrt(3*9*x^2*x^2*x^2*x*y^2*y)}}}
extract the square roots of each perfect square
{{{3x*x*x*y*sqrt(3xy)}}}
which is:
{{{3x^3y*sqrt(3xy)}}}