命题 (8 8:57:15)下列命题:1.若A+B+C=0,则 B2 -4AC大于或等于0;2.若B大于A+C,则一元二次方程AX2 +BX+C=0有两个不相等的实数根;3.若B=2A+3C,则一元二次方程AX2+BX+C=0有两个不相等的
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![命题 (8 8:57:15)下列命题:1.若A+B+C=0,则 B2 -4AC大于或等于0;2.若B大于A+C,则一元二次方程AX2 +BX+C=0有两个不相等的实数根;3.若B=2A+3C,则一元二次方程AX2+BX+C=0有两个不相等的](/uploads/image/z/2834118-54-8.jpg?t=%E5%91%BD%E9%A2%98+%288+8%3A57%3A15%29%E4%B8%8B%E5%88%97%E5%91%BD%E9%A2%98%EF%BC%9A1.%E8%8B%A5A%2BB%2BC%3D0%2C%E5%88%99%26%23160%3BB2%26%23160%3B-4AC%E5%A4%A7%E4%BA%8E%E6%88%96%E7%AD%89%E4%BA%8E0%EF%BC%9B2.%E8%8B%A5B%E5%A4%A7%E4%BA%8EA%2BC%2C%E5%88%99%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8BAX2%26%23160%3B%2BBX%2BC%EF%BC%9D0%E6%9C%89%E4%B8%A4%E4%B8%AA%E4%B8%8D%E7%9B%B8%E7%AD%89%E7%9A%84%E5%AE%9E%E6%95%B0%E6%A0%B9%EF%BC%9B3.%E8%8B%A5B%EF%BC%9D2A%EF%BC%8B3C%2C%E5%88%99%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8BAX2%EF%BC%8BBX%EF%BC%8BC%EF%BC%9D0%E6%9C%89%E4%B8%A4%E4%B8%AA%E4%B8%8D%E7%9B%B8%E7%AD%89%E7%9A%84)
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