# Simple expression

1. May 18, 2008

### alpha01

can someone please show how 2/5(sqrt(3)^5) = 18sqrt(3) / 5

thanks

2. May 18, 2008

### cristo

Staff Emeritus
Can you write $$\sqrt{3}^5$$ as $3^n$ for some rational, n?

I'm moving this to precalc HW forum.

3. May 18, 2008

### alpha01

no, i cant find n.

also, this isn't a homework or school related question. I cant see why a warning was necessary.

4. May 19, 2008

### Tedjn

$$\sqrt{3}$$ is three raised to what power?

5. May 19, 2008

### CompuChip

You can also go the other way around, and divide out as much common terms from both sides as possible. Then see if you can prove the remaining identity.