已知抛物线y=x²+mx-2m²(m≠0).已知抛物线y=x²+mx-2m²(m≠0).(1)该抛物线是否与x轴有两个不同点?请说明理 (2)过点P(0,n),作y轴的垂线交于点A和点B(点A在点P的左边),是否存在
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![已知抛物线y=x²+mx-2m²(m≠0).已知抛物线y=x²+mx-2m²(m≠0).(1)该抛物线是否与x轴有两个不同点?请说明理 (2)过点P(0,n),作y轴的垂线交于点A和点B(点A在点P的左边),是否存在](/uploads/image/z/7216593-33-3.jpg?t=%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dx%26%23178%3B%2Bmx-2m%26%23178%3B%28m%E2%89%A00%29.%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dx%26%23178%3B%2Bmx-2m%26%23178%3B%28m%E2%89%A00%29.%EF%BC%881%EF%BC%89%E8%AF%A5%E6%8A%9B%E7%89%A9%E7%BA%BF%E6%98%AF%E5%90%A6%E4%B8%8Ex%E8%BD%B4%E6%9C%89%E4%B8%A4%E4%B8%AA%E4%B8%8D%E5%90%8C%E7%82%B9%3F%E8%AF%B7%E8%AF%B4%E6%98%8E%E7%90%86+%EF%BC%882%EF%BC%89%E8%BF%87%E7%82%B9P%EF%BC%880%2Cn%EF%BC%89%2C%E4%BD%9Cy%E8%BD%B4%E7%9A%84%E5%9E%82%E7%BA%BF%E4%BA%A4%E4%BA%8E%E7%82%B9A%E5%92%8C%E7%82%B9B%EF%BC%88%E7%82%B9A%E5%9C%A8%E7%82%B9P%E7%9A%84%E5%B7%A6%E8%BE%B9%EF%BC%89%2C%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8)
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