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#1 2010-12-18 06:55:04
- maltlover
- Guest
re-arranging to make A the subject
hi guys,
i cant seem to be able to do this question, its really killing me...tried lots of things and nothing seems to work.
make A the subject of the formula;
i can't do it 
is it possible?
#2 2010-12-18 06:57:14
- Au101
- Member
- Registered: 2010-12-01
- Posts: 353
Re: re-arranging to make A the subject
Certainly it's possible, however, you will have As on both sides.
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#3 2010-12-18 07:06:11
- maltlover
- Guest
Re: re-arranging to make A the subject
hi,
is there a way to have a single A on one side and no As on the other?
#4 2010-12-18 07:09:46
- Au101
- Member
- Registered: 2010-12-01
- Posts: 353
Re: re-arranging to make A the subject
Hi there,
No I don't think that that is possible in this case. It is, however, perfectly acceptable to have As on both sides, simply rearrange it such that you have it in that form.
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#5 2010-12-18 10:44:35
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: re-arranging to make A the subject
Hi maltlover;
Yes you can do it but it is not easy. You have to be able to solve a cubic equation.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#6 2010-12-18 10:54:32
- Au101
- Member
- Registered: 2010-12-01
- Posts: 353
Re: re-arranging to make A the subject
That's a very good point Bobbym, I completely overlooked that, for which I appologise.
Last edited by Au101 (2010-12-18 10:55:13)
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#7 2010-12-18 10:59:47
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: re-arranging to make A the subject
Hi Au101;
I do not think I greeted you yet with the official forum greeting. So, here it is.
Welcome to the forum!
No apology necessary!
If this forum and forums in general are going to teach you one thing is that no one never makes a mistake. Problems on forums are nasty, remember some one else already could not solve them. That is why they posted it.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#8 2010-12-18 11:07:52
- Au101
- Member
- Registered: 2010-12-01
- Posts: 353
Re: re-arranging to make A the subject
Thanks Bobbym, your comments are always helpful and interesting and you seem to have mastered the art of tailoring your comments to the level of the person who you are helping very well 
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#9 2010-12-18 11:20:38
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: re-arranging to make A the subject
The reason for that is simple, it is rare that I am smarter than the person posing the question. So we automatically understand each other. If I answer a question it is only because I asked it yesterday or the day before.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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