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#2 Help Me ! » Imaginary Numbers » 2005-09-20 14:19:11

notamathperson
Replies: 3

I understand my homework pretty well this time, but I do have a couple questions:

Simplify (√-4) x (√-8)
I ended up getting 2√8, but I'm not sure if this is correct

Also, can this number be simplified any more: (2+2i√14) / 6?
Specifically, can the square root be simplified or could it look something like this: (1+i√14) / 3?

#3 Re: Help Me ! » Homework problems » 2005-09-13 19:25:43

Yes, sorry I forgot to add the parentheses.

#4 Re: Help Me ! » Homework problems » 2005-09-13 13:52:06

Thanks Kyle.  Here's the work I have so far on the others

6/x-2  -  1/x+5 = 2/x^2+3x-10
6x+30/x^2+3x-10  -  x-2/x^2+3x-10
5x+32/x^2+3x-10 = 2/x^2+3x-10

Should I cross multiply and get big numbers or is their a more efficient way?

The third problem:
x/x-1 +3 = 1/x-1
x/x-1 + 3/1 = 1/x-1
x/x-1 + 3x-3/x-1 = 1/x-1
4x-3/x-1 = 1/x-1

Same thing here.

#5 Help Me ! » Homework problems » 2005-09-13 11:24:57

notamathperson
Replies: 9

Hey I'm a college algebra student who really struggles with this subject.  Any help I can get here will be greatly appreciated.

Here are a few problems I've had on my homework.  I'd really like to know how to work the problems, so if someone could show me step by step, that'd be great.

1. y-2[3-(y+9)]=12-(y-7)


2. 6/x-2  -  1/x+5 = 2/x2+3x-10


3. x/x-1 +3 = 1/x-1


That's all for now.  I'm not sure what the best way to indicate x squared (as in #2, I put x2), though.  Thanks

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