如果关于x的一元二次方程a(1+x^)+2bx-c(1-x^)=0有两个相等的实数根,那么以a,b,c为边的三角形ABC是什么形在a+ax²+2bx-c+cx²=0(a+c)x²+2bx+(a-c)=0有两个相等的实数根判别式等于04b²-4(a+c)(a-c)=0b
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![如果关于x的一元二次方程a(1+x^)+2bx-c(1-x^)=0有两个相等的实数根,那么以a,b,c为边的三角形ABC是什么形在a+ax²+2bx-c+cx²=0(a+c)x²+2bx+(a-c)=0有两个相等的实数根判别式等于04b²-4(a+c)(a-c)=0b](/uploads/image/z/970842-66-2.jpg?t=%E5%A6%82%E6%9E%9C%E5%85%B3%E4%BA%8Ex%E7%9A%84%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8Ba%281%2Bx%5E%29%2B2bx-c%281-x%5E%29%3D0%E6%9C%89%E4%B8%A4%E4%B8%AA%E7%9B%B8%E7%AD%89%E7%9A%84%E5%AE%9E%E6%95%B0%E6%A0%B9%2C%E9%82%A3%E4%B9%88%E4%BB%A5a%2Cb%2Cc%E4%B8%BA%E8%BE%B9%E7%9A%84%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E6%98%AF%E4%BB%80%E4%B9%88%E5%BD%A2%E5%9C%A8a%2Bax%26%23178%3B%2B2bx-c%2Bcx%26%23178%3B%3D0%28a%2Bc%29x%26%23178%3B%2B2bx%2B%28a-c%29%3D0%E6%9C%89%E4%B8%A4%E4%B8%AA%E7%9B%B8%E7%AD%89%E7%9A%84%E5%AE%9E%E6%95%B0%E6%A0%B9%E5%88%A4%E5%88%AB%E5%BC%8F%E7%AD%89%E4%BA%8E04b%26%23178%3B-4%28a%2Bc%29%28a-c%29%3D0b)
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