Can anyone please help me solve this with step by step solution? Thanks a lot in advance.

Question

1. Evaluate and simplify the given expression when x = 9; x^1/2 – x^3/2

Answer 1

y=root(x) -x^3/2...evaluate at x=9

root(9)=+-3

x^3/2=root av the kube av x=root(729)=+-27

the "-" in front av term 2 dont matter, kauz gotta look at both roots

y at x=9...+-3  +-27...30 & -30, 24 & -24

Answer 2

you need to have the problem down, i dont see it