Question

http://i44.tinypic.com/wtefte.png

number 7 and 8 guys... a little help please? especially number 7 >.<

Answer 1

rationalize the 8th one.

Answer 2

okaay... so the answer is (10+8i+(15i-12)sqrt3)/41 ??

Answer 3

Btw, which OS is this?

Answer 4

OS?

Answer 5

Operating system.

Answer 6

If ur talking about the OS im using, its Linux :) why? specifically Lubuntu

Answer 7

\[\frac{2+\sqrt{-27}}{5-\sqrt{-16}}\to \frac{2+3i \sqrt3}{2+3i \sqrt3} \times \frac{2-3i \sqrt{3}}{2-3i \sqrt{3}}\]

Answer 8

Ah, cool. I never tried Lubuntu. Is it good?

Answer 9

Good enough. but not for games tho >.<

Answer 10

wait, how did it become like that :/ ?

Answer 11

where did 5 - sqrt(-16) go?

Answer 12

First, i simplified the radical. Then i rationalized it.

Answer 13

Windows is best for games.
Ubunutu is nice too.
I use Puppy Linux too. it's light-weight and fast.

Answer 14

\[2 + \sqrt{-27}\div5-\sqrt{-16} = 2 + 3i \sqrt{3} \div 5 - 4i\]

Answer 15

I still prefer Kubuntu tho, but Lubuntu takes lesser space >.< I have no complaints tho, as long as there's MS Word and stuff, good enough for me ^^

Answer 16

Nice.

Yes, you may do it that way too. Now rationalize.

Answer 17

\[\frac{ 2 + 3i \sqrt{3} }{5 - 4i } \rightarrow \frac{ 2 + 3i \sqrt{3} }{5 - 4i } x \frac{ 5 - 4i }{ 5-4i }\]

Answer 18

oh wait that shud be 5 +4i xD

Answer 19

Yep

Answer 20

\[\frac{ 2 + 3i \sqrt{3} }{ 5 - 4i } \rightarrow \frac{ 2 + 3i \sqrt{3} }{ 5 - 4i } x \frac{ 5 + 4i }{ 5 + 4i }\]

Answer 21

so if i times it, it will be more or less....

Answer 22

Yes yes.
i gtg.

Answer 23

ok, thanks for ur help :)

Answer 24

okay, can someone help me in #7 >.<