# F of G function question - Square root inside a square root?

1. Sep 12, 2012

### nukeman

1. The problem statement, all variables and given/known data

The image has the question I don't quite understand!

2. Relevant equations

3. The attempt at a solution

I understand how to get √(√2 - x) but I dont get how they end up with: 4√2 - x

?

Last edited: Sep 12, 2012
2. Sep 12, 2012

### Staff: Mentor

Your notation is incorrect. This is what you wrote:
$$\sqrt{\sqrt{2} - x}$$

What you should have written is
$$\sqrt{\sqrt{2-x}}$$

Without using LaTeX, as I did, you could have written √(√(2 - x))

Do you see the difference?

3. Sep 12, 2012

### nukeman

Ah yea, I see the difference. Gotta start writing in latex!

I still dont understand the problem as I pointed out in the picture. ?

4. Sep 12, 2012

### Staff: Mentor

Write the expression in exponent form rather than radical form.