Question 243958
If I am reading your problem correctly we have
sqrt(20x^8*y2)
BTW it could be read sqrt(20x)^8*y^2
factor 20
20=4*5
sqrt of 20 =2*sqrt(5)
sqrt of x^8=x^4
sqrt of y^2=y
so we put them together and we have
2*sqrt(5)*x^*4y