关于x的二次函数y=x^2-2mx-m的图像与x轴交于A(x1,0),B(x2,0)两点,且x2〉0〉x1,与y轴交于点C,且∠BAC = ∠BCO.(1)求这个二次函数解析式.(2)以点D(√2 ,0)为圆心作⊙D,与y轴相切于点O,过抛物线上一
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![关于x的二次函数y=x^2-2mx-m的图像与x轴交于A(x1,0),B(x2,0)两点,且x2〉0〉x1,与y轴交于点C,且∠BAC = ∠BCO.(1)求这个二次函数解析式.(2)以点D(√2 ,0)为圆心作⊙D,与y轴相切于点O,过抛物线上一](/uploads/image/z/6866613-45-3.jpg?t=%E5%85%B3%E4%BA%8Ex%E7%9A%84%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0y%3Dx%5E2-2mx-m%E7%9A%84%E5%9B%BE%E5%83%8F%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8EA%28x1%2C0%29%2CB%28x2%2C0%29%E4%B8%A4%E7%82%B9%2C%E4%B8%94x2%E3%80%890%E3%80%89x1%2C%E4%B8%8Ey%E8%BD%B4%E4%BA%A4%E4%BA%8E%E7%82%B9C%2C%E4%B8%94%E2%88%A0BAC+%3D+%E2%88%A0BCO.%EF%BC%881%EF%BC%89%E6%B1%82%E8%BF%99%E4%B8%AA%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0%E8%A7%A3%E6%9E%90%E5%BC%8F.%EF%BC%882%EF%BC%89%E4%BB%A5%E7%82%B9D%EF%BC%88%E2%88%9A2+%2C0%EF%BC%89%E4%B8%BA%E5%9C%86%E5%BF%83%E4%BD%9C%E2%8A%99D%2C%E4%B8%8Ey%E8%BD%B4%E7%9B%B8%E5%88%87%E4%BA%8E%E7%82%B9O%2C%E8%BF%87%E6%8A%9B%E7%89%A9%E7%BA%BF%E4%B8%8A%E4%B8%80)
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