# Math Help - Tough simplifying

1. ## Tough simplifying

Simplify $y = [-\frac{2(\sqrt{x}-2)^2(x-1)}{\sqrt{x}-4}] - 1$

2. Originally Posted by Punch
Simplify $y = [-\frac{2(\sqrt{x}-2)^2(x-1)}{\sqrt{x}-4}] - 1$
The first obvious step would be to add the fractions:
$y= -\frac{2(\sqrt{x}-2)^2(x-1)+ \sqrt{x- 4}}{\sqrt{x}-4}$ but I don't see that very much "simplifying" can be done.

3. Shouldn't it be $y= -\frac{2(\sqrt{x}-2)^2(x-1)- \sqrt{x} + 4}{\sqrt{x}-4}$ ?

4. Originally Posted by Bacterius
Shouldn't it be $y= -\frac{2(\sqrt{x}-2)^2(x-1)- \sqrt{x} + 4}{\sqrt{x}-4}$ ?
Yes, it was probably just a latex typo.

And Punch:
If you want, you could do that and expand the brackets on the numerator. You will find that a few terms (like the $x^1$ terms) will cancel and you can play around with the indices (the square roots that pop up).