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#1
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⨷ÂìÊÁ¡Òá¡ÓÅѧÊͧÍÂèÒ§ÂÒ¡ Á.3
28/m^2-9 + m/3-m + 7/3+m =1¨§ËÒ¤èÒm
3x^2+bx+5=0 áÅФèÒx¤èÒ˹Öè§à·èҡѺ-1 ¨§ËÒ¤èÒxÍÕ¡¤èÒ˹Öè§ ¶éÒÃҡ˹Ö觢ͧÊÁ¡ÒÃ(q-r)x^2+(r-p)x+p-q=0 ÁÕ¤èÒà·èҡѺ1ÍÕ¡Ãҡ˹Ö觢ͧÊÁ¡ÒÃà·èҡѺà·èÒäà ¶éÒ(x+2)(x+3)(x-4)(x-6)=10x^2 â´Â·Õèx#3 áÅéÇx^2-6x+1à·èҡѺà·èÒäà ¶éÒr1áÅÐr2à»ç¹ÃÒ¡¢Í§ÊÁ¡ÒÃax^2-bx+c=0àÁ×èÍa#0 áÅéÇr1+r2+r1+r2ÁÕ¤èÒà·èÒäà ¡Ó˹´ãËéráÅÐsà»ç¹ÃÒ¡¢Í§ÊÁ¡Òà x^2+px+q=0 ¶éÒráÅÐs ÁÕ¤èÒà¾ÔèÁ¢Öé¹ 10%áÅФèÒ·Õèà¡Ô´¢Öé¹ãËÁè·Ñé§ÊͧÊÍ´¤Åéͧ¡ÑºÊÁ¡Òà x^2+Apx+Bq=0 áÅéÇA+B ÁÕ¤èÒ»ÃÐÁÒ³à·èÒäà x^2-p^2=0 2x^2+9ax=180a^2 ⨷Âì·Õè¡ÁÒªèǵͺãËé˹è;ÃéÍÁÇÔ¸Õ·Ó´éǤÃѺ¢Íº¤Ø³¤ÃѺ |
#2
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¨Ð¶ÒÁ·Ñé§·Õ ËÒ¡¾ÔÁ¾ìãË餹·ÕèÍÂÒ¡¨ÐµÍºÍèÒ¹§èÒ¡ÇèÒ¹ÕéÊÑ¡¹Ô´¨Ð´Õ¤ÃѺ ¤Ô´ÇèÒ¹èÒ¨Ðà»ç¹ÁÒµÑé§áµè¨Ò¡ÇÔªÒ¡ÒÃ.¤ÍÁáÅéÇ
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¤¹ä·ÂÃèÇÁã¨ÍÂèÒãªéÀÒÉÒÇÔºÑµÔ ½Ö¡¾ÔÁ¾ìÊÑÅѡɳìÊÑ¡¹Ô´ ªÕÇÔµ(¤¹µÍºáÅФ¹¶ÒÁ)¨Ð§èÒ¢Öé¹àÂÍÐ (¨ÃÔ§æ¹Ð) Stay Hungry. Stay Foolish. |
#3
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¢éÍ 4 (x+2)(x-6)(x-4)(x+3)=10x^2
( x^2-4x-12)(x^2-x-12)=10x^12 ãËé x^2-12=m ---------------> (m-4x)(m-x)=10x^2 m^2 -5mx+4x^2 =10x^2 m^2 -5mx -6x^2=0 -------------> (m+x)(m-6x)=0 ´Ñ§¹Ñé¹ ( x^2+x-12)(x^2-6x-12)=0 x^2-6x=12 -------> x^2-6x+1=13
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#4
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¢éÍ 3 àÍÒ (q-r) ËÒõÅÍ´ áÅéÇãËéÍÕ¡ÃÒ¡ÊÁ¡Òä×Í m------>
(x-1)(x-m)=x^2 -x(1+m)+m --------> ¨Ðä´é m=(p-q)/(q-r)
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#5
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ªèÇÂáÊ´§ÇÔ¸Õ¤Ô´¢éÍ 7 ´éǤÃѺ
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·Õè¤ÓµÍº¤Ø³äÁèàËÁ×͹¤¹Í×è¹à¾Õ§¤¹à´ÕÂÇ ÍÒ¨äÁèãªé¤Ø³¼Ô´ áµèÍÒ¨à¾ÃÒФ¹Í×è¹à¤éÒ¼Ô´¡çä´é |
#6
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7¡. ÊٵüŵèÒ§¡ÓÅѧÊͧ¡ÅèÒÇäÇéÇèÒ...
7¢. $2x^2+9ax-180a^2=(2x-15a)(x+12a)=0$
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¤¹ä·ÂÃèÇÁã¨ÍÂèÒãªéÀÒÉÒÇÔºÑµÔ ½Ö¡¾ÔÁ¾ìÊÑÅѡɳìÊÑ¡¹Ô´ ªÕÇÔµ(¤¹µÍºáÅФ¹¶ÒÁ)¨Ð§èÒ¢Öé¹àÂÍÐ (¨ÃÔ§æ¹Ð) Stay Hungry. Stay Foolish. |
#7
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ÃÙéÊÖ¡ÇèÒ¢éÍ 7 ¹Õé p=à»ç¹¨Ó¹Ç³ã´æ¡çä´é·Õè¨Ó¹Ç¨Ó¹Ç³¹Ñ鹵ç¢éÒÁ¤èҢͧ x ·Ø¡¨Ó¹Ç³
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#8
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¢éÍ 7 . ¢.à¹Õ蠤سnongtum ªèÇÂáÊ´§ÇÔ¸ÕËÒ¤èÒ aáÅÐx ãËé´Ù´éÇÂ
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#9
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¢éÍ 7¢ ãËéµÍº x ã¹à·ÍÁ¢Í§ a ¤ÃѺ äÁèµéͧËÒ a ÍÍ¡ÁÒ Êèǹ¡ÒÃËÒ x ¡çãËé´ÙáµèÅÐǧàÅçºÇèÒà»ç¹ÈÙ¹ÂìáÅéÇá¡éËÒ x ·ÕÅÐǧàÅ纤ÃѺ äÁè¹èÒÂÒ¡
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¤¹ä·ÂÃèÇÁã¨ÍÂèÒãªéÀÒÉÒÇÔºÑµÔ ½Ö¡¾ÔÁ¾ìÊÑÅѡɳìÊÑ¡¹Ô´ ªÕÇÔµ(¤¹µÍºáÅФ¹¶ÒÁ)¨Ð§èÒ¢Öé¹àÂÍÐ (¨ÃÔ§æ¹Ð) Stay Hungry. Stay Foolish. |
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