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 Post subject: Square rootsPosted: Tue, 8 May 2012 19:46:05 UTC
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Joined: Tue, 8 May 2012 19:30:50 UTC
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Hi, I am working on a problem set and I have reached at the following:

((√c-8)/√c)((4√c)/(√c-24))= -1/4

4((√c-8)/(√c-24))= -1/4

How do i solve for c?

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 Post subject: Re: Square rootsPosted: Tue, 8 May 2012 20:47:51 UTC
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Location: Ottawa Ontario
a.nourrice wrote:
(√c-8)

Unclear: is that SQRT(c) - 8 or SQRT(c-8)?

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 Post subject: Re: Square rootsPosted: Tue, 8 May 2012 21:26:56 UTC
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Joined: Tue, 8 May 2012 19:30:50 UTC
Posts: 4
its SQRT(c) - 8

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 Post subject: Re: Square rootsPosted: Tue, 8 May 2012 21:33:48 UTC
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Joined: Wed, 21 May 2003 04:27:18 UTC
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a.nourrice wrote:
Hi, I am working on a problem set and I have reached at the following:

((√c-8)/√c)((4√c)/(√c-24))= -1/4

4((√c-8)/(√c-24))= -1/4

How do i solve for c?

Another question: Is the second line your attempt to simplify the first one?

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"The only way to learn mathematics is to do mathematics."
Paul Halmos

Pierre Simon de Laplace

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 Post subject: Re: Square rootsPosted: Tue, 8 May 2012 21:45:19 UTC
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Joined: Tue, 8 May 2012 19:30:50 UTC
Posts: 4
yes, the second equation is a simplification of the first one which I have done... I am not sure if it is the right step to solve for c, I am confused because I am led to believe i need to apply rationalization here

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 Post subject: Re: Square rootsPosted: Tue, 8 May 2012 22:05:51 UTC
 Member of the 'S.O.S. Math' Hall of Fame

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a.nourrice wrote:
yes, the second equation is a simplification of the first one which I have done... I am not sure if it is the right step to solve for c, I am confused because I am led to believe i need to apply rationalization here

Assuming you mean :

Forget rationalizing, just cross multiply:

Can you take it from here?

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"The only way to learn mathematics is to do mathematics."
Paul Halmos

Pierre Simon de Laplace

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 Post subject: Re: Square rootsPosted: Tue, 8 May 2012 22:16:39 UTC
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Joined: Tue, 8 May 2012 19:30:50 UTC
Posts: 4
Yes! I can take over from where you left. Thank you for your help

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 Post subject: Re: Square rootsPosted: Tue, 8 May 2012 22:21:17 UTC
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Joined: Wed, 21 May 2003 04:27:18 UTC
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You are welcome!

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"The only way to learn mathematics is to do mathematics."
Paul Halmos

Pierre Simon de Laplace

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