如图所示,对称轴为x=3的抛物线y=ax2+2x与x轴相交于点B,O. (1)求抛物线的解析式,并求出顶点A的坐标;7、(2010•达州)如图所示,对称轴为x=3的抛物线y=ax2+2x与x轴相交于点B,O.(1)求抛物
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![如图所示,对称轴为x=3的抛物线y=ax2+2x与x轴相交于点B,O. (1)求抛物线的解析式,并求出顶点A的坐标;7、(2010•达州)如图所示,对称轴为x=3的抛物线y=ax2+2x与x轴相交于点B,O.(1)求抛物](/uploads/image/z/6093216-0-6.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E5%AF%B9%E7%A7%B0%E8%BD%B4%E4%B8%BAx%3D3%E7%9A%84%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax2%2B2x%E4%B8%8Ex%E8%BD%B4%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9B%2CO%EF%BC%8E+%EF%BC%881%EF%BC%89%E6%B1%82%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F%2C%E5%B9%B6%E6%B1%82%E5%87%BA%E9%A1%B6%E7%82%B9A%E7%9A%84%E5%9D%90%E6%A0%87%EF%BC%9B7%E3%80%81%EF%BC%882010%26%238226%3B%E8%BE%BE%E5%B7%9E%EF%BC%89%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E5%AF%B9%E7%A7%B0%E8%BD%B4%E4%B8%BAx%3D3%E7%9A%84%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax2%2B2x%E4%B8%8Ex%E8%BD%B4%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9B%2CO%EF%BC%8E%EF%BC%881%EF%BC%89%E6%B1%82%E6%8A%9B%E7%89%A9)
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