Radical expression truly is radical to solve...

Question

amtran_bus · Answer

attachment

nincompoop · Answer

do you know how to "FOIL"?

amtran_bus · Answer

I do.

nincompoop · Answer

what you're basically doing is the same when you're distributing 
(a+b) (c-d) 
ac - ad +bc -bd

amtran_bus · Answer

$$\sqrt{18}-\sqrt{-24}-\sqrt{-24}+$$

amtran_bus · Answer

Dumb thing, supposed to be +sqrt(32) at the end

nincompoop · Answer

can you further simplify?

amtran_bus · Answer

Give me a sec.

nincompoop · Answer

you know sqrt(18) is the same as sqrt(9*2) and sqrt(9) is 3 so you are left with 3 sqrt(2)

nincompoop · Answer

I think you know what you're doing, but you're just doubtful.

amtran_bus · Answer

$$3\sqrt{2}-2i \sqrt{6}-2i \sqrt{6}+4\sqrt{2}$$

amtran_bus · Answer

Is that right?

nincompoop · Answer

yeah something like that... I am not even going to double check it :D you have the concepts down correctly.

nincompoop · Answer

- 2i sqrt(6) -2i sqrt(6) = ?

amtran_bus · Answer

umm...4i sqrt 36
...........4i+6?

nincompoop · Answer

you're adding two negatives 
-5 - 5 = -10
-7 - 13 = -20

amtran_bus · Answer

-4i

nincompoop · Answer

2 sqrt(x) + 5 sqrt(x) = 7 sqrt(x) 
20 sqrt(b) + 500 sqrt(b) = 520 sqrt(b)

amtran_bus · Answer

-4i+sqrt -12

amtran_bus · Answer

-4i+i sqrt 12

nincompoop · Answer

if the number under the radical sign is the same, you can ADD them also

nincompoop · Answer

-4i + i ? where did the other i come from?

amtran_bus · Answer

4+2sqrt 3 ???

amtran_bus · Answer

It came from sqrt -12, can't you make it i*sqrt12?

nincompoop · Answer

2 sqrt(x) + 5 sqrt(x) = 7 sqrt(x)
20 sqrt(b) + 500 sqrt(b) = 520 sqrt(b)

nincompoop · Answer

3 sqrt(2) + 4 sqrt(2) =?

amtran_bus · Answer

7+sqrt 2?

nincompoop · Answer

YES! 
2 sqrt(x) + 5 sqrt(x) = 7 sqrt(x) 
20 sqrt(b) + 500 sqrt(b) = 520 sqrt(b)

nincompoop · Answer

read the examples I have been giving you. they give you all the clues

amtran_bus · Answer

;)

amtran_bus · Answer

So now i have $$7+\sqrt(2) +3\sqrt(2)    +4\sqrt(2)$$

nincompoop · Answer

what?????????

nincompoop · Answer

what the fork!

nincompoop · Answer

read all the stuff from the beginning

amtran_bus · Answer

Well, I obviously can't do this, but I love AmTran buses!

amtran_bus · Answer

amtran_bus · Answer

Thanks for your help!

amtran_bus · Answer

I thought we found the answer for the 2 parts with I'S?

amtran_bus · Answer

@nincompoop