Homework Help: Adding Square roots Help

1. Sep 7, 2014

Phycisists

How do I solve, 1:

(√3*√3*√3)/(√3+√3+√3)? How do I simplify it? I'm confused on how to shorten √x+√x+√x, I just don't get it.

Also if:

√700 = 26.46, then how is √70000 = 264.6? Shouldn't it be 2646?

2. Sep 7, 2014

√3*√3 = ?

3. Sep 7, 2014

Phycisists

√9, but I don't understand hpw to simplify when it's +...

4. Sep 7, 2014

BvU

orange + orange + orange = 3 oranges.
Similarly √3+√3+√3 = 3√3

Voko would have liked it a lot better if you would have typed a number, not an expression... How much is √9 ?

5. Sep 7, 2014

Staff: Mentor

Try writing 70000 as 700*100, see where that gets you.

6. Sep 7, 2014

Ray Vickson

Really? Go back and think about the DEFINITION of √3, or √n for any number n. In other words, when we speak of the number r = √n, what is the fundamental relationship between r and n?

7. Sep 7, 2014

PeroK

I think that quite a few people never learn or forget that:

$$\overbrace{x + x + \ \dots + x}^{n \ times} = nx$$