已知:如图,在平面直角坐标系内,Rt△ABC的斜边AB在x轴上,点C的坐标为(0,6),AB=15,∠CBA>∠CAB,且tan∠CAB、tan∠CBA是关于x的方程x2+mx+n=0的两根,(1)求m、n的值.(2)若∠ACB的角平分线交x轴于D
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![已知:如图,在平面直角坐标系内,Rt△ABC的斜边AB在x轴上,点C的坐标为(0,6),AB=15,∠CBA>∠CAB,且tan∠CAB、tan∠CBA是关于x的方程x2+mx+n=0的两根,(1)求m、n的值.(2)若∠ACB的角平分线交x轴于D](/uploads/image/z/6876219-3-9.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BC%9A%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E5%86%85%2CRt%E2%96%B3ABC%E7%9A%84%E6%96%9C%E8%BE%B9AB%E5%9C%A8x%E8%BD%B4%E4%B8%8A%2C%E7%82%B9C%E7%9A%84%E5%9D%90%E6%A0%87%E4%B8%BA%EF%BC%880%2C6%EF%BC%89%2CAB%3D15%2C%E2%88%A0CBA%EF%BC%9E%E2%88%A0CAB%2C%E4%B8%94tan%E2%88%A0CAB%E3%80%81tan%E2%88%A0CBA%E6%98%AF%E5%85%B3%E4%BA%8Ex%E7%9A%84%E6%96%B9%E7%A8%8Bx2%2Bmx%2Bn%3D0%E7%9A%84%E4%B8%A4%E6%A0%B9%2C%EF%BC%881%EF%BC%89%E6%B1%82m%E3%80%81n%E7%9A%84%E5%80%BC%EF%BC%8E%EF%BC%882%EF%BC%89%E8%8B%A5%E2%88%A0ACB%E7%9A%84%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BF%E4%BA%A4x%E8%BD%B4%E4%BA%8ED)
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