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ÀÌÂ÷¹æÁ¤½Ä ÃÖ´ë(¼Ò)°ªÀÇ x ÁÂÇ¥

y = ax^2 + bx + c ¸¦ ¹ÌºÐÇϸé ÃÖ´ë(¼Ò)°ª¿¡¼­

0 À̹ǷΠ 2ax + b = 0  

x = -b/(2a)

a > 0 ÀÎ °æ¿ì ÃÖ¼Ò°ªÀ»

a < 0 ÀÎ °æ¿ì ÃÖ´ë°ªÀ» °®´Â´Ù.

µû¶ó¼­, yÀÇ ÃÖ´ë(¼Ò)°ªÀº ´ÙÀ½°ú °°´Ù.

y = a*(-b/(2a))^2 + b*(-b/(2a)) + c

*** Âü°í¹®Çå[References] ***

y = a*(-b/(2*a))^2 + b*(-b/(2*a)) + c
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