Question 947723
It can at best be guessed you are starting with {{{sqrt(75x^3y^4)}}}.


Factor what is in side the square root frame completely:
{{{sqrt(3*5*5*x^3*y^4)}}}


Each PAIR of factors inside can be taken to the outside as ONE factor instead of two factors.


{{{sqrt(3*(5*5)*(x^2)*x*(y^2)(y^2))}}}


{{{highlight(5xy^2*sqrt(3x))}}}