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Factoring a multivariate polynomial by grouping: Problem typ

 
 
Leaka
 
Reply Mon 10 Mar, 2008 12:24 pm
Factoring a multivariate polynomial by grouping: Problem type 1

Waaaah!
I really don't understand this one at all.
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Type: Discussion • Score: 1 • Views: 4,795 • Replies: 6
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JPB
 
  1  
Reply Mon 10 Mar, 2008 12:27 pm
got an example?
0 Replies
 
Leaka
 
  1  
Reply Mon 10 Mar, 2008 12:36 pm
7x+7z+xt+tz

There you go.
0 Replies
 
Francis
 
  1  
Reply Mon 10 Mar, 2008 12:53 pm
7(x+z) + t(x+z) = (7+t)*(x+z)
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raprap
 
  1  
Reply Mon 10 Mar, 2008 06:07 pm
The way I'd recommend to a novice

7x+7z+xt+tz
group variables
(7x+xt)+(7z+tz)
factor out commpn variables
x(7+t)+z(7+t)
note that bothe have common factors
regroup
(x+z)(7+t)
check amswer (always important)
7x+xt+7z+zt
it works

Rap
0 Replies
 
dadpad
 
  1  
Reply Mon 10 Mar, 2008 08:25 pm
My question would be....why!
0 Replies
 
raprap
 
  1  
Reply Mon 10 Mar, 2008 08:55 pm
This reminds me very little of the song

Quote:
ARTIST: Tom Lehrer
TITLE: Wernher Von Braun

Gather round while I sing you of Wernher von Braun
A man whose allegiance is ruled by expedience
Call him a Nazi, he won't even frown
"Ha, Nazi schmazi," says Wernher von Braun

Don't say that he's hypocritical
Say rather that he's apolitical
"Once the rockets are up, who cares where they come down
That's not my department," says Wernher von Braun


Some have harsh words for this man of renown
But some think our attitude should be one of gratitude
Like the widows and cripples in old London town
Who owe their large pensions to Wernher von Braun

You too may be a big hero
Once you've learned to count backwards to zero
"In German oder English I know how to count down
Und I'm learning Chinese," says Wernher von Braun


Rap
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