# How do you simplify #(x-1)/(sqrt x - x)#?

##### 1 Answer

To start lets get rid of the radical sign using substitution. This isn't especially important to the solution, but it does make it easier to recognize some of the identities we will be using.

Let

Substituting

We can factor the top and bottom to try and find a term that cancels.

If we multiply the denominator by

Split up the

Now we can cancel the two

Undoing the substitution from before we have our simplified function.