几题数学题目.急!一、求下列抛物线的对称抽和顶点坐标.1.y=x-2x²2.y=2x(3x-x)3.y=9-2x-x²二、求下列二次函数的图像与x轴的交点.1.y=-(x+2)(x-2)2.y=9x²-493.y=5+x-4x²4.y=(x+1)²-9
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![几题数学题目.急!一、求下列抛物线的对称抽和顶点坐标.1.y=x-2x²2.y=2x(3x-x)3.y=9-2x-x²二、求下列二次函数的图像与x轴的交点.1.y=-(x+2)(x-2)2.y=9x²-493.y=5+x-4x²4.y=(x+1)²-9](/uploads/image/z/9319040-8-0.jpg?t=%E5%87%A0%E9%A2%98%E6%95%B0%E5%AD%A6%E9%A2%98%E7%9B%AE.%E6%80%A5%21%E4%B8%80%E3%80%81%E6%B1%82%E4%B8%8B%E5%88%97%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E5%AF%B9%E7%A7%B0%E6%8A%BD%E5%92%8C%E9%A1%B6%E7%82%B9%E5%9D%90%E6%A0%87.1.y%3Dx-2x%26sup2%3B2.y%3D2x%283x-x%293.y%3D9-2x-x%26sup2%3B%E4%BA%8C%E3%80%81%E6%B1%82%E4%B8%8B%E5%88%97%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E7%9A%84%E5%9B%BE%E5%83%8F%E4%B8%8Ex%E8%BD%B4%E7%9A%84%E4%BA%A4%E7%82%B9.1.y%3D-%28x%2B2%29%28x-2%292.y%3D9x%26sup2%3B-493.y%3D5%2Bx-4x%26sup2%3B4.y%3D%28x%2B1%29%26sup2%3B-9)
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