Question 355151
They give you s[h(x)] in the brackets.


They also tell us that h(x) = x^2.



Replace h(x) in the brackets with x^2.



Doing so we get s[x^2].



We also know that s(x) = 2x.  



Now replace x in s(x) with x^2.



s(x^2) = 2x



s(x^2) = 2(x^2)



s(x^2) = 2x^2.



Answer = 2x^2.