抛物线y=2x²+6x+m与x轴交于AB两点且AB=2求M的值.
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抛物线y=2x²+6x+m与x轴交于AB两点且AB=2求M的值.
抛物线y=2x²+6x+m与x轴交于AB两点且AB=2求M的值.
抛物线y=2x²+6x+m与x轴交于AB两点且AB=2求M的值.