1.已知一元二次方程(c-a)x^2+2bx+c+a=0有两个相等实根,a.b.c是△ABC的三边,且2b=a+c,求a:b:c【我知道根据两根相等可得出a^2+b^2=c^2,但跟2b=a+c不会换算】2.关于x的分式方程m/(x-5)=1,下列说法正确的是
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![1.已知一元二次方程(c-a)x^2+2bx+c+a=0有两个相等实根,a.b.c是△ABC的三边,且2b=a+c,求a:b:c【我知道根据两根相等可得出a^2+b^2=c^2,但跟2b=a+c不会换算】2.关于x的分式方程m/(x-5)=1,下列说法正确的是](/uploads/image/z/1836104-32-4.jpg?t=1.%E5%B7%B2%E7%9F%A5%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8B%EF%BC%88c-a%EF%BC%89x%5E2%2B2bx%2Bc%2Ba%3D0%E6%9C%89%E4%B8%A4%E4%B8%AA%E7%9B%B8%E7%AD%89%E5%AE%9E%E6%A0%B9%2Ca.b.c%E6%98%AF%E2%96%B3ABC%E7%9A%84%E4%B8%89%E8%BE%B9%2C%E4%B8%942b%3Da%2Bc%2C%E6%B1%82a%3Ab%3Ac%E3%80%90%E6%88%91%E7%9F%A5%E9%81%93%E6%A0%B9%E6%8D%AE%E4%B8%A4%E6%A0%B9%E7%9B%B8%E7%AD%89%E5%8F%AF%E5%BE%97%E5%87%BAa%5E2%2Bb%5E2%3Dc%5E2%2C%E4%BD%86%E8%B7%9F2b%3Da%2Bc%E4%B8%8D%E4%BC%9A%E6%8D%A2%E7%AE%97%E3%80%912.%E5%85%B3%E4%BA%8Ex%E7%9A%84%E5%88%86%E5%BC%8F%E6%96%B9%E7%A8%8Bm%2F%28x-5%29%3D1%2C%E4%B8%8B%E5%88%97%E8%AF%B4%E6%B3%95%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%98%AF)
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