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## Homework Statement

So f(x)= x(√x-1)

## Homework Equations

## The Attempt at a Solution

So i understand that the derivitive of a mutiple is (f x g) prime

f'xg + fxg'

I got

(1)(√x-1) + (x)(1/2x^-1/2)

now im stuck...

ive used the equation (f(x)-f(x))/x-a and i ended up with x^3/2 -1

but when i used (f')(g)+(f)(g)'

i get 3/2x^1/2 - 1

and now i am just really confused... i could really use some help :D

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