如图,二次函数y=ax²+bx+c的图象交x轴于A[-1,0],B[2,0],交y轴于C[0,-2],过A,C画直线1.求二次函数的解析式2.点P在x轴正半轴上,且PA=PC,求OP的长3.点M在二次函数图像上,以M为圆心的圆与直线AC相切,
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![如图,二次函数y=ax²+bx+c的图象交x轴于A[-1,0],B[2,0],交y轴于C[0,-2],过A,C画直线1.求二次函数的解析式2.点P在x轴正半轴上,且PA=PC,求OP的长3.点M在二次函数图像上,以M为圆心的圆与直线AC相切,](/uploads/image/z/2499333-69-3.jpg?t=%E5%A6%82%E5%9B%BE%2C%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0y%3Dax%26%23178%3B%EF%BC%8Bbx%EF%BC%8Bc%E7%9A%84%E5%9B%BE%E8%B1%A1%E4%BA%A4x%E8%BD%B4%E4%BA%8EA%5B-1%2C0%5D%2CB%5B2%2C0%5D%2C%E4%BA%A4y%E8%BD%B4%E4%BA%8EC%5B0%2C-2%5D%2C%E8%BF%87A%2CC%E7%94%BB%E7%9B%B4%E7%BA%BF1.%E6%B1%82%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F2.%E7%82%B9P%E5%9C%A8x%E8%BD%B4%E6%AD%A3%E5%8D%8A%E8%BD%B4%E4%B8%8A%2C%E4%B8%94PA%3DPC%2C%E6%B1%82OP%E7%9A%84%E9%95%BF3.%E7%82%B9M%E5%9C%A8%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E5%9B%BE%E5%83%8F%E4%B8%8A%2C%E4%BB%A5M%E4%B8%BA%E5%9C%86%E5%BF%83%E7%9A%84%E5%9C%86%E4%B8%8E%E7%9B%B4%E7%BA%BFAC%E7%9B%B8%E5%88%87%2C)
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