过点P(4,-4)的直线l被圆C:x^2+y^2-2x-4y-20=0截得的弦AB长为8,求直线l方程rt...我实在是没钱了= =
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![过点P(4,-4)的直线l被圆C:x^2+y^2-2x-4y-20=0截得的弦AB长为8,求直线l方程rt...我实在是没钱了= =](/uploads/image/z/3703492-28-2.jpg?t=%E8%BF%87%E7%82%B9P%284%2C-4%29%E7%9A%84%E7%9B%B4%E7%BA%BFl%E8%A2%AB%E5%9C%86C%3Ax%5E2%2By%5E2-2x-4y-20%3D0%E6%88%AA%E5%BE%97%E7%9A%84%E5%BC%A6AB%E9%95%BF%E4%B8%BA8%2C%E6%B1%82%E7%9B%B4%E7%BA%BFl%E6%96%B9%E7%A8%8Brt...%E6%88%91%E5%AE%9E%E5%9C%A8%E6%98%AF%E6%B2%A1%E9%92%B1%E4%BA%86%3D+%3D)
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