如图,已知直线EF‖x轴,点E的坐标是(0,-4),又知抛物线y=ax^2-2ax-3a与x轴交于A、B两点,与y轴交于点P(0,m).(1)求A.B两点的坐标 ;(2)当二次函数y=ax^2-2ax-3a的顶点在x轴与直线EF之间(不在EF上
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![如图,已知直线EF‖x轴,点E的坐标是(0,-4),又知抛物线y=ax^2-2ax-3a与x轴交于A、B两点,与y轴交于点P(0,m).(1)求A.B两点的坐标 ;(2)当二次函数y=ax^2-2ax-3a的顶点在x轴与直线EF之间(不在EF上](/uploads/image/z/6963952-40-2.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5%E7%9B%B4%E7%BA%BFEF%E2%80%96x%E8%BD%B4%2C%E7%82%B9E%E7%9A%84%E5%9D%90%E6%A0%87%E6%98%AF%EF%BC%880%2C-4%EF%BC%89%2C%E5%8F%88%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax%5E2-2ax-3a%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8EA%E3%80%81B%E4%B8%A4%E7%82%B9%2C%E4%B8%8Ey%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9P%EF%BC%880%2Cm%EF%BC%89.%EF%BC%881%EF%BC%89%E6%B1%82A.B%E4%B8%A4%E7%82%B9%E7%9A%84%E5%9D%90%E6%A0%87+%EF%BC%9B%EF%BC%882%EF%BC%89%E5%BD%93%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0y%3Dax%5E2-2ax-3a%E7%9A%84%E9%A1%B6%E7%82%B9%E5%9C%A8x%E8%BD%B4%E4%B8%8E%E7%9B%B4%E7%BA%BFEF%E4%B9%8B%E9%97%B4%EF%BC%88%E4%B8%8D%E5%9C%A8EF%E4%B8%8A)
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