# Imaginary Numbers

• Apr 21st 2008, 04:47 PM
~berserk
Imaginary Numbers
• Apr 21st 2008, 04:58 PM
mr fantastic
Quote:

Originally Posted by ~berserk

$3 \sqrt{5} i + \sqrt{5} i = 4 \sqrt{5} i$ ......!
• Apr 21st 2008, 05:04 PM
~berserk
thanks, i kinda dropped the ball on that one but what about the other two?
• Apr 21st 2008, 09:58 PM
mr fantastic
Quote:

Originally Posted by ~berserk
thanks, i kinda dropped the ball on that one but what about the other two?

What about them? Are you trying to do? Simplify?

$3 \sqrt{-11} = 3 \sqrt{11} \, i$. And that's it.

$-\sqrt{-\frac{1}{3}} = -\sqrt{\frac{1}{3}}\, i = - \frac{i}{\sqrt3} = - \frac{\sqrt{3} \, i}{3}$.