¨D¡G®Ú¸¹(X^4-3X^2+4) + ®Ú¸¹(X^4-3X^2-8x+20) ªº³Ì¤pÈ
®Ú¸¹(X^4-3X^2+4) + ®Ú¸¹(X^4-3X^2-8x+20)
=®Ú¸¹[(x^2-2)^2+x^2]+®Ú¸¹[(x^2-2)^2+(x-4)^2]
YP¬°抛ª«½u y=x^2¤Wªº¥ô·NÂI¡A
²Ä1Ó®Ú¸¹¬OP¨ìA(0,2)ªº¶ZÂ÷¡A²Ä2Ó®Ú¸¹¬OP¨ìB(4,2)ªº¶ZÂ÷¡C
¦³³Ì¤pȮɡAP¦bª½½uAB»P抛ª«½u¥æÂI¤W¡C
³Ì¤pÈ=½u¬qAB=4¡A¦¹®É x=®Ú¸¹2¡C