如图,已知二次函数y=ax^+bx+c的图像经过A(-2,0)、B(4,0)、C(0,3)三点,联结BC,AC,该二次函数图像的对称轴与x轴相交于点D(1)求这个二次函数的解析式,点D的坐标及直线BC的函数解析式(2)在线段
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![如图,已知二次函数y=ax^+bx+c的图像经过A(-2,0)、B(4,0)、C(0,3)三点,联结BC,AC,该二次函数图像的对称轴与x轴相交于点D(1)求这个二次函数的解析式,点D的坐标及直线BC的函数解析式(2)在线段](/uploads/image/z/7651829-29-9.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0y%3Dax%5E%2Bbx%2Bc%E7%9A%84%E5%9B%BE%E5%83%8F%E7%BB%8F%E8%BF%87A%EF%BC%88-2%2C0%EF%BC%89%E3%80%81B%284%2C0%29%E3%80%81C%280%2C3%29%E4%B8%89%E7%82%B9%2C%E8%81%94%E7%BB%93BC%2CAC%2C%E8%AF%A5%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E5%9B%BE%E5%83%8F%E7%9A%84%E5%AF%B9%E7%A7%B0%E8%BD%B4%E4%B8%8Ex%E8%BD%B4%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9D%EF%BC%881%EF%BC%89%E6%B1%82%E8%BF%99%E4%B8%AA%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F%2C%E7%82%B9D%E7%9A%84%E5%9D%90%E6%A0%87%E5%8F%8A%E7%9B%B4%E7%BA%BFBC%E7%9A%84%E5%87%BD%E6%95%B0%E8%A7%A3%E6%9E%90%E5%BC%8F%EF%BC%882%EF%BC%89%E5%9C%A8%E7%BA%BF%E6%AE%B5)
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