Thread: Imaginary Numbers

1. Imaginary Numbers

could someone please help

2. Originally Posted by ~berserk

could someone please help
$\displaystyle 3 \sqrt{5} i + \sqrt{5} i = 4 \sqrt{5} i$ ......!

3. thanks, i kinda dropped the ball on that one but what about the other two?

4. 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?

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

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