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ÀÌÂ÷¹æÁ¤½Ä(quadratic equation), ±Ù°ú °è¼ö¿ÍÀÇ °ü°è(relation between roots and coefficients)

ÀÛ¼ºÀÚ Uploader : ¾îÁ¦Ã³·³ ÀÛ¼ºÀÏ Upload Date: 2018-09-10º¯°æÀÏ Update Date: 2018-09-10Á¶È¸¼ö View : 587

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ÀÌÂ÷ ¹æÁ¤½ÄÀÇ ±Ù°ú °è¼ö¿ÍÀÇ °ü°è´Â ±×¸²°ú °°´Ù.

À̸¦ ÀÌ¿ëÇÏ¿©, ¥á^2 + ¥â^2 , (¥á - ¥â)^2 À» ±¸ÇÒ ¼ö ÀÖ´Ù.
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¢º º¯¼öÀÔ·Â (a¡Á0)


¢º ¥á + ¥â


¢º ¥á*¥â


¡á ¥á^2 + ¥â^2 = (¥á + ¥â)^2 - 2¥á*¥â =  (-b/a)^2 - 2*c/a


¡á (¥á - ¥â)^2 = ¥á^2 + ¥â^2 - 2¥á¥â = (¥á + ¥â)^2 - 4¥á*¥â = (-b/a)^2 - 4*c/a


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