|
ÊÁѤÃÊÁÒªÔ¡ | ¤ÙèÁ×Í¡ÒÃãªé | ÃÒª×èÍÊÁÒªÔ¡ | »¯Ô·Ô¹ | ¢éͤÇÒÁÇѹ¹Õé | ¤é¹ËÒ |
|
à¤Ã×èͧÁ×ͧ͢ËÑÇ¢éÍ | ¤é¹ËÒã¹ËÑÇ¢é͹Õé |
#1
|
|||
|
|||
á¹Ð¹ÓÇÔ¸Õá¡é⨷Âì¡Ã³±ì(§èÒÂæÍÕ¡áÅéÇ)˹èͤÃѺ
$¨§ËÒ¤èҢͧ x ¨Ò¡ÊÁ¡Òà \sqrt{2x-3\sqrt{x+4} } = 1$
¤×Íà¢éÒã¨ÇèÒ¡¡ÓÅѧÊͧãËéÃÙ·ËÅØ´ áµè·ÓµèÍäÁèä´é ªèÇÂá¹Ð¹ÓµèÍ˹è͹ФÃѺ
__________________
Stupid Newbie |
#2
|
|||
|
|||
$2x-3\sqrt{x+4}=1$
$2x-1=3\sqrt{x+4}$ $4x^2-4x+1=9x+36$ $4x^2-13x-35=0$ ¤ÃѺ |
#3
|
|||
|
|||
ÍéÒ§ÍÔ§:
ÁÒºÃ÷Ѵ·Õè $4x^2-4x+1=9x+36$ ·ÓÂѧä§ÍèÒ¤ÃѺ ?
__________________
Stupid Newbie |
#4
|
|||
|
|||
¡¡ÓÅѧÊͧ¤ÃѺ (·Ñé§Êͧ¢éÒ§)
|
#5
|
|||
|
|||
Åͧ¡´Ùä´é
$4x^2+1=9x+36$ áµè4xËÒÂä» ¼Á¡¡ÓÅѧ¼Ô´µÃ§ä˹ÃÖà»ÅèÒ¤ÃѺ
__________________
Stupid Newbie |
#6
|
||||
|
||||
$(1+1)^2=1^2+1^2$
|
#7
|
||||
|
||||
ÍéÒ§ÍÔ§:
$ÂéÒ 9x+36 ÁÒ ¨Ðä´é 4x^2-4x+1 -9x -36 = 0 ¨Ð ä´é 4x^2-13x-35 = 0$ $ààÅéǶʹ 4x^2-13x-35 = 0 à»ç¹ 2 ǧàÅçº ¡ç¨Ðä´é (4x+7)(x-5) = 0$ $ãËéǧàÅçº 1 à·èҡѺ 0 ¨Ðä´é$ $; 4x+7 = 0 $ $ x= \frac{-7}{4}$ $ãËéǧàÅçº ·Õè 2 = 0 $ $; (x-5) = 0$ $ x = 5$ $¡ç¨Ðä´é 2 ¤ÓµÍº$ $µÍº \frac{-7}{4} , 5 ¤ÃѺ¼Á $
__________________
º·àÃÕ¹§èÒÂæ·Õèà´ç¡æä´éàÃÕ¹ÃÙéÂÔè§ÇÔè§àÃçÇà·èÒäËÃè ÂÔè§ÅéÁà¨çºÁÒ¡à·èÒ¹Ñé¹ 13 ÁԶعÒ¹ 2012 20:33 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 2 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ ÍÂÒ¡à¡è§¤³ÔµÈÒʵÃì¤ÃѺ |
#8
|
||||
|
||||
ÍéÒ§ÍÔ§:
¤ÃѺààµè¼Á¡çäÁèà¢éÒã¨ÇèÒ·ÓäÁ 5 à»ç¹¤ÓµÍºà´ÕÂÇ â¨·Âì¡Ó˹´ãËéËÒ¤èÒ x äÁèÁÕà§×Í¹ä¢¹Ô ºÍ¡´éǹФÃѺ¨Ðä´éà¢éÒã¨
__________________
º·àÃÕ¹§èÒÂæ·Õèà´ç¡æä´éàÃÕ¹ÃÙéÂÔè§ÇÔè§àÃçÇà·èÒäËÃè ÂÔè§ÅéÁà¨çºÁÒ¡à·èÒ¹Ñé¹ |
#9
|
|||
|
|||
ÍéÒ§ÍÔ§:
Å᷹ͧ¤èÒ x ã¹ÊÁ¡ÒÃà´ÔÁáÅéÇËÃ×ÍÂѧ¤ÃѺ
__________________
ÁÒËÒ¤ÇÒÁÃÙéäÇéµÔÇËÅÒ¹ áµèËÅÒ¹äÁèàÍÒàÅ¢áÅéÇ à¢éÒÁÒ·ÓàÅ¢àÍÒÁѹÍÂèÒ§à´ÕÂÇ ¤ÇÒÁÃÙéà»ç¹ÊÔè§à´ÕÂÇ·ÕèÂÔè§ãËé ÂÔè§ÁÕÁÒ¡ ÃÙéÍÐäÃäÁèÊÙé ÃÙé¨Ñ¡¾Í (¡àÇ鹤ÇÒÁÃÙé äÁèµéͧ¾Í¡çä´é ËÒäÇéÁÒ¡æáËÅдÕ) (áµè¡çÍÂèÒãËéÁÒ¡¨¹·èÇÁËÑÇ àÍÒµÑÇäÁèÃÍ´) |
#10
|
||||
|
||||
__________________
º·àÃÕ¹§èÒÂæ·Õèà´ç¡æä´éàÃÕ¹ÃÙéÂÔè§ÇÔè§àÃçÇà·èÒäËÃè ÂÔè§ÅéÁà¨çºÁÒ¡à·èÒ¹Ñé¹ |
|
|