I need help asap. Finals in couple hours.

f(x) = SquareRoot(x^2 + 9) over [0,3]

I got 2pi integral from 0,3 and inside of integral i put x(SquareRoot(x^2 + 9)dx.

I know that I'm suppose to multiply it out but I dont know how to im suppose to multiply that because of the square root. help would be appreciated.

Sorry for not using the symbolic characters.