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## #1 2013-02-11 04:01:58

cooljackiec
Full Member

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### x =

Find all real values of  x that satisfy the equation (x^2-82)^2 = 324

Last edited by bobbym (2013-02-11 05:04:17)

I see you have graph paper.
You must be plotting something

## #2 2013-02-11 04:55:53

bobbym

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### Re: x =

Hi;

x  = 10, x = 8, x = -8, x = -10

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #3 2013-02-11 06:59:25

cooljackiec
Full Member

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### Re: x =

help me on another one

\frac{c}{c-5}=\frac{4}{c-4}

FInd c.

Also, the LaTeX doesn't seem to work..

I see you have graph paper.
You must be plotting something

## #4 2013-02-11 07:02:06

bobbym

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### Re: x =

Hi;

Latex is out temporarily.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #5 2013-02-11 16:49:24

Sabbir
Guest

### Re: x =

If you cross multiply,then you'd get c^2-4c=4c-20 which is c^2-8c+20=0,now you just have to find the polynomial's roots.

## #6 2013-02-11 22:20:14

bobbym

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### Re: x =

Hi;

I am getting

c = 4 - 2 i and c = 4 + 2 i

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.