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Old 24 Á¡ÃÒ¤Á 2010, 19:42
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Old 24 Á¡ÃÒ¤Á 2010, 19:56
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Old 24 Á¡ÃÒ¤Á 2010, 19:57
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Old 24 Á¡ÃÒ¤Á 2010, 20:22
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Old 24 Á¡ÃÒ¤Á 2010, 21:36
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Old 25 Á¡ÃÒ¤Á 2010, 17:19
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Old 25 Á¡ÃÒ¤Á 2010, 17:40
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$AB^2+AC^2 = 2(BD^2+AD^2)$ ....Åͧ¾ÔÊÙ¨¹ì´Ù¤ÃѺ

$4^2 + 3^2 = 2(x^2+(\frac{5}{2})^2)$

$x = \frac{5}{2}$

$BC = 5$
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Old 25 Á¡ÃÒ¤Á 2010, 17:45
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¢éÍ 1

$$10x + 28y = 2002$$

$$x = \frac{2002-28y}{10}$$

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Old 25 Á¡ÃÒ¤Á 2010, 18:56
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ÍéÒ§ÍÔ§:
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Attachment 2487

Attachment 2488

$AB^2+AC^2 = 2(BD^2+AD^2)$ ....Åͧ¾ÔÊÙ¨¹ì´Ù¤ÃѺ

$4^2 + 3^2 = 2(x^2+(\frac{5}{2})^2)$

$x = \frac{5}{2}$

$BC = 5$
¢Íº¤Ø³ÁÒ¡ æ ¤ÃѺ :') à¢éÒã¨áÅéÇ .
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  #10  
Old 25 Á¡ÃÒ¤Á 2010, 19:06
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Pre ¹¤ÃÃÒªÊÕÁÒ¤×ÍääѺ
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Old 25 Á¡ÃÒ¤Á 2010, 19:29
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Old 25 Á¡ÃÒ¤Á 2010, 20:47
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Old 25 Á¡ÃÒ¤Á 2010, 21:29
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Old 25 Á¡ÃÒ¤Á 2010, 22:39
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Old 25 Á¡ÃÒ¤Á 2010, 22:53
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