请帮我解决几道二次函数的题,1.已知抛物线顶点是(-5,0),且经过点(-3,1),求抛物线的解析式.2.若抛物线y=-x^2+bx+c的最高点为(-1,-3),求b和c.3.一个周长为12cm的矩形①写出矩形面积S与一边a之间
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![请帮我解决几道二次函数的题,1.已知抛物线顶点是(-5,0),且经过点(-3,1),求抛物线的解析式.2.若抛物线y=-x^2+bx+c的最高点为(-1,-3),求b和c.3.一个周长为12cm的矩形①写出矩形面积S与一边a之间](/uploads/image/z/2604385-1-5.jpg?t=%E8%AF%B7%E5%B8%AE%E6%88%91%E8%A7%A3%E5%86%B3%E5%87%A0%E9%81%93%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E7%9A%84%E9%A2%98%2C1.%E5%B7%B2%E7%9F%A5%E6%8A%9B%E7%89%A9%E7%BA%BF%E9%A1%B6%E7%82%B9%E6%98%AF%28-5%2C0%29%2C%E4%B8%94%E7%BB%8F%E8%BF%87%E7%82%B9%EF%BC%88-3%2C1%EF%BC%89%2C%E6%B1%82%E6%8A%9B%E7%89%A9%E7%BA%BF%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F.2.%E8%8B%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D-x%5E2%2Bbx%2Bc%E7%9A%84%E6%9C%80%E9%AB%98%E7%82%B9%E4%B8%BA%EF%BC%88-1%2C-3%EF%BC%89%2C%E6%B1%82b%E5%92%8Cc.3.%E4%B8%80%E4%B8%AA%E5%91%A8%E9%95%BF%E4%B8%BA12cm%E7%9A%84%E7%9F%A9%E5%BD%A2%E2%91%A0%E5%86%99%E5%87%BA%E7%9F%A9%E5%BD%A2%E9%9D%A2%E7%A7%AFS%E4%B8%8E%E4%B8%80%E8%BE%B9a%E4%B9%8B%E9%97%B4)
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