Question 314204
{{{sqrt(250x^5y^3)=sqrt(50^2x^4y^2*xy)}}}
{{{sqrt(250x^5y^3)=sqrt(50^2x^4y^2)sqrt(xy)}}}
{{{sqrt(250x^5y^3)=50x^2y*sqrt(xy)}}}
.
.
.
EDIT: Oops, that tutor is CORRECT. It's 250 not 2500. 
{{{sqrt(250x^5y^3)=sqrt(5^2x^4y^2)sqrt(10xy)}}}
{{{sqrt(250x^5y^3)=5x^2y*sqrt(10xy)}}}