#3 Help.

=  ( 3^2 * 2 * x * x^6 * y^6)^1/2

=     3 x^3 y^3  sqrt(2 x)

 

Did I do too many steps at once?

Second one   Multiply the numerator AND denominator by   (sqrt 2 - sqrt 10)  then simplify all of the terms to get

-3/2+1/2 sqrt(5)