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ÊÁѤÃÊÁÒªÔ¡ ¤ÙèÁ×Í¡ÒÃãªé ÃÒª×èÍÊÁÒªÔ¡ »¯Ô·Ô¹ ¢éͤÇÒÁÇѹ¹Õé

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à¤Ã×èͧÁ×ͧ͢ËÑÇ¢éÍ ¤é¹ËÒã¹ËÑÇ¢é͹Õé
  #1  
Old 11 µØÅÒ¤Á 2006, 08:41
¤³ÔµÈÒʵÃì ¤³ÔµÈÒʵÃì äÁèÍÂÙèã¹Ãкº
ºÑ³±Ôµ¿éÒ
 
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Post ¡ÒÃᡵÑÇ»ÃСͺ¾ËعÒÁ

a^2+(m+n)a+mn c^2-36 p^2+2pq+q^2
m^2-n^2 a^2-4 a^4+a^2-2 3x^2-12 6m^2+29m+33 x^6-125y^3 *x^2(m-1) -5x^(m-1) +6
7a^2-12a-27 m^2+2mn+n^2 1-a^2 b^4 x^2+4x-221
(5a+2b)^2 - (3a-7b)^2 c^6-7c^3-8 x^8-16y^8
3ac-ad-3bc+bd 16m^3n+28m^2 n^2-30mn^3
x^2 -1/x a^4+64 ·Ø¡¢éÍá¡â´ÂÇÔ¸Õ¡ÓÅѧÊͧÊÁºÙóìáÅÐáÊ´§ÇÔ¸Õ·ÓÍÂèÒ§ÅÐàÍÕ´
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #2  
Old 11 µØÅÒ¤Á 2006, 09:58
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Mastermander Mastermander äÁèÍÂÙèã¹Ãкº
¡ÃкÕè»ÃÐÊÒ¹ã¨
 
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Post

$x^2+(a+b)x+ab=(x+b)(x+a)$
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âÅ¡¹ÕéÁÕ¤¹ÍÂÙè 10 »ÃÐàÀ· ¤×Í ¤¹·Õèà¢éÒã¨àÅ¢°Ò¹Êͧ áÅФ¹·ÕèäÁèà¢éÒã¨

16 µØÅÒ¤Á 2006 10:03 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ Mastermander
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #3  
Old 11 µØÅÒ¤Á 2006, 10:10
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Post

¨Ð¶ÒÁ·Ñé§·Õ ËÒ¡¾ÔÁ¾ìãË餹·ÕèÍÂÒ¡¨ÐµÍºÍèÒ¹§èÒ¡ÇèÒ¹ÕéÊÑ¡¹Ô´¨Ð´Õ¤ÃѺ ¤Ô´ÇèÒ¹èÒ¨Ðà»ç¹ÁÒµÑé§áµè¨Ò¡ÇÔªÒ¡ÒÃ.¤ÍÁáÅéÇ
¼Áá¡é¡ÒþÔÁ¾ìãËéÍèÒ¹§èÒ¢Öé¹ Êèǹ·ÕèàËÅ×ÍÅͧ¤Ô´àͧ´Ù ⨷Âì¾Ç¡¹ÕéäÁèÂÒ¡ËÒ¡¾ÂÒÂÒÁ¤Ô´ÊÑ¡¹Ô´
äÁèä´éµÃ§ä˹â»Ã´¶ÒÁà¨ÒÐà»ç¹¨Ø´æ¤ÃѺ ÍÂèÒ¶ÒÁ¡ÇҴẺ¹Õé

ÍéÒ§ÍÔ§:
¢éͤÇÒÁà´ÔÁ¢Í§¤Ø³ ¤³ÔµÈÒʵÃì:
$a^2+(m+n)a+mn$
$c^2-36$
$p^2+2pq+q^2$
$m^2-n^2$
$a^2-4$
$a^4+a^2-2$
$3x^2-12$
$6m^2+29m+33$
$x^6-125y^3$
$x^{2(m-1)} -5x^{m-1} +6$
$7a^2-12a-27$
$m^2+2mn+n^2$
$1-a^2 b^4$
$x^2+4x-221$
$(5a+2b)^2 - (3a-7b)^2$
$c^6-7c^3-8$
$x^8-16y^8$
$3ac-ad-3bc+bd$
$16m^3n+28m^2$
$n^2-30mn^3$
$x^2 -\frac{1}{x}$
$a^4+64$

·Ø¡¢éÍá¡â´ÂÇÔ¸Õ¡ÓÅѧÊͧÊÁºÙóìáÅÐáÊ´§ÇÔ¸Õ·ÓÍÂèÒ§ÅÐàÍÕ´
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¤¹ä·ÂÃèÇÁã¨ÍÂèÒãªéÀÒÉÒÇԺѵÔ
½Ö¡¾ÔÁ¾ìÊÑ­ÅѡɳìÊÑ¡¹Ô´ ªÕÇÔµ(¤¹µÍºáÅФ¹¶ÒÁ)¨Ð§èÒ¢Öé¹àÂÍÐ (¨ÃÔ§æ¹Ð)

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µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #4  
Old 16 µØÅÒ¤Á 2006, 09:14
¤³ÔµÈÒʵÃì ¤³ÔµÈÒʵÃì äÁèÍÂÙèã¹Ãкº
ºÑ³±Ôµ¿éÒ
 
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Post

¢éÍ1,3,6,9,10,12,15,17,18 á¡äÁè¶Ù¡
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #5  
Old 16 µØÅÒ¤Á 2006, 13:54
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Question

¼ÁäÁèä´éᡵÑÇ»ÃСͺàÅÂÊÑ¡¢éÍ¹Ò á¤è¾ÔÁ¾ì⨷ÂìãËéãËÁèµÒÁ·Õèá¡ÐÍÍ¡à·èÒ¹Ñé¹ ¼Ô´µÃ§ä˹¡çºÍ¡ãËéªÑ´æÊÔ¤ÃѺ
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¤¹ä·ÂÃèÇÁã¨ÍÂèÒãªéÀÒÉÒÇԺѵÔ
½Ö¡¾ÔÁ¾ìÊÑ­ÅѡɳìÊÑ¡¹Ô´ ªÕÇÔµ(¤¹µÍºáÅФ¹¶ÒÁ)¨Ð§èÒ¢Öé¹àÂÍÐ (¨ÃÔ§æ¹Ð)

Stay Hungry. Stay Foolish.
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #6  
Old 16 µØÅÒ¤Á 2006, 15:36
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¼Ùé¾Ô·Ñ¡Éì¡®¢Ñé¹ÊÙ§
 
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Smile

¤ÓÇèÒ "á¡äÁè¶Ù¡" ¤§ËÁÒ¶֧ ¤Ø³ ¤³ÔµÈÒʵÃì ·ÓäÁèä´é

ÅͧÍèÒ¹º·¤ÇÒÁ¹Õé´Ù¹Ð¤ÃѺ.
¡ÒÃᡵÑÇ»ÃСͺ
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #7  
Old 17 µØÅÒ¤Á 2006, 08:33
¤³ÔµÈÒʵÃì ¤³ÔµÈÒʵÃì äÁèÍÂÙèã¹Ãкº
ºÑ³±Ôµ¿éÒ
 
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Post

Î×Á ¢éÍ1 ¹ÕéÁÕÊÁºÑµÔ¡ÒÃᨡᨧãªèäËÁ¤ÃѺ a^2 +(m+n)a+mn = a^2 +ma+na+mn
áÅéÇ·Ó¶Ù¡äËÁ¶éÒ¼Ô´µéͧ¢Íâ·É´éǤس nongtum áµè·ÓäÁ¶Ö§ä´é (a+m)( a+n)
¢éÍ2 (c-6)(c+6)áµè·ÓẺ¡ÓÅѧÊͧÊÁºÙóìäÁèà»ç¹
¢éÍ3 ÍÂÙèã¹ÃÙ»¡ÓÅѧÊͧÊÁºÙóì àÍêÐ àËÁ×͹¢éÍ1 àÅÂÍëÍ ¤Ø³ nongtum ¤ÃѺ ¢éÍ1 Áѹ¡çÍÂÙèã¹ÃÙ»à´ÕÂǡѺ¢éÍ1ãªèäËÁ¤ÃѺ
¢éÍ4 áʹ§èÒÂáµè·ÓẺ¡ÓÅѧÊͧÊÁºÙóìäÁèà»ç¹ ¢é͹ÕéµÍº (m-n)(m+n)
¢éÍÍ×è¹æ´Ù§èÒÂáÅéÇ áµè¢éÍ10 ¼Áä¢äÁèÍÍ¡ªèÇ·դÃѺ
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #8  
Old 17 µØÅÒ¤Á 2006, 22:13
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¼Ùé¾Ô·Ñ¡Éì¡®·ÑèÇä»
 
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Smile

¢ÍµÍºá·Ã¡ã¹¤Ó¶ÒÁÅСѹ¹Ð...
ÍéÒ§ÍÔ§:
¢éͤÇÒÁà´ÔÁ¢Í§¤Ø³ ¤³ÔµÈÒʵÃì:
¢éÍ1 ¹ÕéÁÕÊÁºÑµÔ¡ÒÃᨡᨧãªèäËÁ¤ÃѺ $a^2 +(m+n)a+mn = a^2 +ma+na+mn$ áÅéÇ·Ó¶Ù¡äËÁ
¶éÒ¼Ô´µéͧ¢Íâ·É´éǤس nongtum áµè·ÓäÁ¶Ö§ä´é (a+m)( a+n)
---> ãªè¤ÃѺ áÅéÇ¡ç¨ÑºÊͧµÑÇáááÅÐÊͧµÑÇËÅѧÁÒ´Ö§µÑÇÃèÇÁ áÅéÇ¡ç´Ö§µÑÇÃèÇÁÍÕ¡µèÍ
äÁèµéͧ¢Íâ·ÉËÃÍ¡¤ÃѺ ·Ó¼Ô´áÅéÇá¡é¹èдÕáÅéÇ

¢éÍ2 (c-6)(c+6)áµè·ÓẺ¡ÓÅѧÊͧÊÁºÙóìäÁèà»ç¹
---> äÁè¨Óà»ç¹µéͧãªé¡ÓÅѧÊͧÊÁºÙóì·Ø¡¢é͹Õè¤ÃѺ ÍéÍÁâÅ¡à»ÅèÒæ

¢éÍ3 ÍÂÙèã¹ÃÙ»¡ÓÅѧÊͧÊÁºÙóì àÍêÐ àËÁ×͹¢éÍ1 àÅÂÍëÍ ¤Ø³ nongtum ¤ÃѺ ¢éÍ1 Áѹ¡çÍÂÙèã¹ÃÙ»à´ÕÂǡѺ¢éÍ1ãªèäËÁ¤ÃѺ
---> ãªè¤ÃѺ áµè¤Ó¶ÒÁËÅѧµ¡Å§¨ÐËÁÒ¶֧¢éÍä˹àÍèÂ

¢éÍ4 áʹ§èÒÂáµè·ÓẺ¡ÓÅѧÊͧÊÁºÙóìäÁèà»ç¹ ¢é͹ÕéµÍº (m-n)(m+n)
---> ¤ÓµÍºàËÁ×͹¢éÍÊͧ¤ÃѺ

¢éÍÍ×è¹æ´Ù§èÒÂáÅéÇ áµè¢éÍ10 ¼Áä¢äÁèÍÍ¡ªèÇ·դÃѺ
---> ¢é͹ÕéÅͧÁͧ $x^{m-1}$ à»ç¹µÑÇá»ÃÍÐäÃÊÑ¡ÍÂèÒ§ áÅéǨÐä´é¾ËعÒÁ¡ÓÅѧÊͧ ¨Ò¡¹Ñ鹡çãªéÇÔ¸Õà´ÔÁæᡵÑǡͺáÅéÇá·¹ $x^{m-1}$ ¡ÅѺ¤ÃѺ
¢ÍÍÀÑ·ÕèµÍºªéÒ Çѹ¹ÕéÂØè§ä»¹Ô´ ¤ÃÒÇËÅѧäÁèµéͧ¶ÒÁà¨ÒШ§¤¹µÍº¡çä´é¤ÃѺ ¤¹Í×è¹·ÕèÍÂÒ¡µÍº¨Ðä´éµÍºä´éÊдǡã¨Ë¹èÍÂ
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¤¹ä·ÂÃèÇÁã¨ÍÂèÒãªéÀÒÉÒÇԺѵÔ
½Ö¡¾ÔÁ¾ìÊÑ­ÅѡɳìÊÑ¡¹Ô´ ªÕÇÔµ(¤¹µÍºáÅФ¹¶ÒÁ)¨Ð§èÒ¢Öé¹àÂÍÐ (¨ÃÔ§æ¹Ð)

Stay Hungry. Stay Foolish.
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #9  
Old 18 µØÅÒ¤Á 2006, 08:15
¤³ÔµÈÒʵÃì ¤³ÔµÈÒʵÃì äÁèÍÂÙèã¹Ãкº
ºÑ³±Ôµ¿éÒ
 
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Post

Î×Á ¤Ø³nongtum µÍºªéÒäÁèà»ç¹ËÃÍ¡¤ÃѺ¼ÁÃÍä´éáÅмÁà¢éÒàÇ纺ÍÃì´¹Õé·Ø¡àªéÒ¤ÃѺ Êèǹ¢éÍ10 ¼Áä´é·ÓáÅéǹÑ蹤×Í´Ö§µÑÇ x^m-1 ¨Ðä´é x^m-1 (x^2 -5x + 6/ x^m-1) ãªèäËÁ¶éÒ¼Ô´¡çªèÇÂá¡éËÃ×ÍãºéãËé¼Á¡çä´é
áÅÐÁÕÍÂÙè¢éÍ˹Öè§ x^2 -1/x ·ÓÂѧ䧪èÇ·դÃѺ¤Ø³ nongtum
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #10  
Old 18 µØÅÒ¤Á 2006, 15:56
passer-by passer-by äÁèÍÂÙèã¹Ãкº
¼Ùé¾Ô·Ñ¡Éì¡®·ÑèÇä»
 
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Smile

ÊÓËÃѺ $ x^2-\frac{1}{x} $ ·Õè¤Ø³¤³ÔµÈÒʵÃì¶ÒÁäÇé ÅͧãªéÊٵüŵèÒ§¡ÓÅѧÊÒÁ´ÙÊÔ¤ÃѺ

$ x^2-\frac{1}{x} = \frac{x^3-1}{x}=\frac{(x-1)(x^2+x+1)}{x}=(x-1)(x+1+\frac{1}{x})$

¢ÍµÍº¢éÍÊØ´·éÒ´éÇÂáÅéǡѹ¹Ð¤ÃѺ

$ a^4+64= (a^2+8)^2 -16a^2= (a^2+8)^2- (4a)^2 =(a^2-4a+8)(a^2+4a+8) $

Note : ÊÓËÃѺ¢éÍÊØ´·éÒ¹Õé ¹Óä»ÊÙèÃٻẺ·ÑèÇä»ä´éÇèÒ $ x^4+4y^4=(x^2-2xy+2y^2)(x^2+2xy+2y^2) $ ËÃ×Í·ÕèàÃÕ¡ÇèÒ Sophie Germain's identity (·Õè¤Ø³ nooonuii à¤Â͸ԺÒÂäÇé·Õè¹Õè¤ÃѺ)
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à¡ÉÕ³µÑÇàͧ »ÅÒÂÁԶعÒ¹ 2557 áµè¨Ð¡ÅѺÁÒà»ç¹¤ÃÑ駤ÃÒÇ
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #11  
Old 18 µØÅÒ¤Á 2006, 15:58
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nongtum nongtum äÁèÍÂÙèã¹Ãкº
¼Ùé¾Ô·Ñ¡Éì¡®·ÑèÇä»
 
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Smile

àÍÒ§Õé ¼Á·Ó¢éÍ 10 ãËé´ÙàÅ´աÇèÒ
ÊÁÁµÔãËé $y=x^{m+1}$ à¢Õ¹⨷ÂìãËÁè¨Ðä´é $y^2-5y+6=(y-3)(y-2)$ áÅéÇá·¹¤èÒ¡ÅѺ¨Ðä´é $(x^{m+1}-3)(x^{m+1}-2)$
ÊèǹÍÕ¡¢éÍÃÇÁàÈÉÊèǹ¡è͹ᡵÑÇ»ÃСͺµÑÇàÈɤÃѺ
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¤¹ä·ÂÃèÇÁã¨ÍÂèÒãªéÀÒÉÒÇԺѵÔ
½Ö¡¾ÔÁ¾ìÊÑ­ÅѡɳìÊÑ¡¹Ô´ ªÕÇÔµ(¤¹µÍºáÅФ¹¶ÒÁ)¨Ð§èÒ¢Öé¹àÂÍÐ (¨ÃÔ§æ¹Ð)

Stay Hungry. Stay Foolish.
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #12  
Old 28 µØÅÒ¤Á 2006, 13:02
¼ÙéäÁè»ÃÐʧ¤ìÍÍ¡¹ÒÁ
 
¢éͤÇÒÁ: n/a
Post

¤×ͪèÇÂáÊ´§ÇÔ¸Õ¤Ô´¢éÍ4 ·Õè a^4-a^2-2 = (a^2+a+Ö[/o]2)(a^2+a-Ö[o]2)
ËÃ×Íà»ÅèÒ¤ÃѺ
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #13  
Old 28 µØÅÒ¤Á 2006, 13:54
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¼Ùé¾Ô·Ñ¡Éì¡®·ÑèÇä»
 
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Post

¢éÍÊÕèá¡ÂѧäÁè¶Ù¡¤ÃѺ ãºéÇèÒ $(x-1)(x+1)$ à»ç¹µÑÇ»ÃСͺ¤ÃѺ ·ÕèàËÅ×ÍËÒàͧ
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¤¹ä·ÂÃèÇÁã¨ÍÂèÒãªéÀÒÉÒÇԺѵÔ
½Ö¡¾ÔÁ¾ìÊÑ­ÅѡɳìÊÑ¡¹Ô´ ªÕÇÔµ(¤¹µÍºáÅФ¹¶ÒÁ)¨Ð§èÒ¢Öé¹àÂÍÐ (¨ÃÔ§æ¹Ð)

Stay Hungry. Stay Foolish.
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
  #14  
Old 28 µØÅÒ¤Á 2006, 16:29
¼ÙéäÁè»ÃÐʧ¤ìÍÍ¡¹ÒÁ's Avatar
¼ÙéäÁè»ÃÐʧ¤ìÍÍ¡¹ÒÁ ¼ÙéäÁè»ÃÐʧ¤ìÍÍ¡¹ÒÁ äÁèÍÂÙèã¹Ãкº
ËÑ´à´Ô¹ÅÁ»ÃÒ³
 
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¢éͤÇÒÁ: 34
¼ÙéäÁè»ÃÐʧ¤ìÍÍ¡¹ÒÁ is on a distinguished road
Post

¤×Í¢Íâ·É¤ÃѺàÁ×èÍ¡Õé¤Ô´ÁÒ¡ä»à˹×èÍÂ
4. a^4+a^2+2= (a^2+2)(a^2-1)Íѹ¹Õé¹èÒ¨Ðãªè¹Ð¤ÃѺ
ÍÕ¡¢éͤ×Í x^6-125y^3=[x-5y][(x^2)^2+x^25y+5^2y^2]
Êèǹ¢éÍ 10¹Õè àÍÍ x4+4y4=(x2−2xy+2y2)(x2+2xy+2y2) àÁ×èÍà»ç¹ÊٵõÒµÑÇ·Õè ¾Ê ¡ÅÒ§µéͧÁÕà¤Ã×èͧËÁÒµèÒ§¡Ñ¹ËÃ×Íà»ÅèÒ¤ÃѺ

¨Ò¡¹Õé¼Á¢Í⨷Âì¾ËعÒÁà¾ÔèÁÍÕ¡ä´éäËÁ¤ÃѺäÇé½Ö¡
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·Õè¤ÓµÍº¤Ø³äÁèàËÁ×͹¤¹Í×è¹à¾Õ§¤¹à´ÕÂÇ ÍÒ¨äÁèãªé¤Ø³¼Ô´ áµèÍÒ¨à¾ÃÒФ¹Í×è¹à¤éÒ¼Ô´¡çä´é
µÍº¾ÃéÍÁÍéÒ§ÍÔ§¢éͤÇÒÁ¹Õé
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