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| thyristor |
 Posted: Thu Apr 10, 2008 10:12 am Post subject: A weird one... |
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Forum Freshman
Joined: 11 Feb 2008
Posts: 66
Location: Sweden
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I know this one's easy but I just felt writing something.
a=2*8
b=4
a+b=20
(a+b)(a-b)=20(a-b)
a*a-b*b=20a-20b
a*a -20a=b*b-20b
a*a-20a+100=b*b-20b+100
(a-10)(a-10)=(b-10)(b-10)
a-10=b-10
a=b
2*8=4!
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| river_rat |
| Posted: Thu Apr 10, 2008 11:34 am Post subject: |
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Forum Ph.D.
Joined: 01 Jun 2006
Posts: 1002
Location: South Africa
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Hint: How do you get from (a-10)(a-10)=(b-10)(b-10) to a-10=b-10?
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As is often the case with technical subjects we are presented with an unfortunate choice: an explanation that is accurate but incomprehensible, or comprehensible but wrong. |
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| serpicojr |
| Posted: Thu Apr 10, 2008 3:07 pm Post subject: |
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Joined: 17 Jul 2007
Posts: 871
Location: JRZ
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It's alive!
Seriously, river_rat, if you're lurking, come back. I could use some help debunking Matthew's "solution" to TSP (he just produces the greedy algorithm) and convincing William that π is indeed less than 22/7 (he's rolled some wheels around and thinks it's bigger). Both are pretty stubborn, but maybe the extra heft of another mathematician could convince them of the error of their ways. I'm sure you can think of some ideas that I haven't yet tried on these fellows. |
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| william |
| Posted: Thu Apr 10, 2008 4:24 pm Post subject: |
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Forum Ph.D.
Joined: 23 Jun 2006
Posts: 905
Location: USA
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| serpicojr wrote: |
It's alive!
Seriously, river_rat, if you're lurking, come back. I could use some help debunking Matthew's "solution" to TSP (he just produces the greedy algorithm) and convincing William that π is indeed less than 22/7 (he's rolled some wheels around and thinks it's bigger). Both are pretty stubborn, but maybe the extra heft of another mathematician could convince them of the error of their ways. I'm sure you can think of some ideas that I haven't yet tried on these fellows. |
Be careful when talking about forum members... my name is william also. And I have no idea what thread you're talking about.
Just trying to maintain my reputation is all. 
Cheers,
william
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| JaneBennet |
| Posted: Thu Apr 10, 2008 4:34 pm Post subject: |
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Forum Junior
Joined: 06 Apr 2008
Posts: 257
Location: UK
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Serpicojr is referring to William McCormick.
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