I am trying to use the quotient rule to solve the following problem.

(x^3-5xsqrtx)/x

I know that:

((f`)(g)-(f)(g`))/g^2 is what I am looking for and this is what I got but it is wrong.

[(3x^2-(5)(1/2sqrtx)(x)-(x^3-5xsqrtx)(1))]/(x^2)

Any help?

Thanks