一般情况下,如果一元二次方程ax^2+bx+c=0(a不等于0)的两个实数根分别为x1和x2,那么x1+x2=—b/a,x1乘x2一般情况下,如果一元二次方程ax^2+bx+c=0(a不等于0)的两个实数根分别为x1和x2,那么x1+x2=—b/a
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![一般情况下,如果一元二次方程ax^2+bx+c=0(a不等于0)的两个实数根分别为x1和x2,那么x1+x2=—b/a,x1乘x2一般情况下,如果一元二次方程ax^2+bx+c=0(a不等于0)的两个实数根分别为x1和x2,那么x1+x2=—b/a](/uploads/image/z/989828-44-8.jpg?t=%E4%B8%80%E8%88%AC%E6%83%85%E5%86%B5%E4%B8%8B%2C%E5%A6%82%E6%9E%9C%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8Bax%5E2%2Bbx%2Bc%3D0%28a%E4%B8%8D%E7%AD%89%E4%BA%8E0%EF%BC%89%E7%9A%84%E4%B8%A4%E4%B8%AA%E5%AE%9E%E6%95%B0%E6%A0%B9%E5%88%86%E5%88%AB%E4%B8%BAx1%E5%92%8Cx2%2C%E9%82%A3%E4%B9%88x1%2Bx2%3D%E2%80%94b%2Fa%2Cx1%E4%B9%98x2%E4%B8%80%E8%88%AC%E6%83%85%E5%86%B5%E4%B8%8B%EF%BC%8C%E5%A6%82%E6%9E%9C%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8Bax%5E2%2Bbx%2Bc%3D0%28a%E4%B8%8D%E7%AD%89%E4%BA%8E0%EF%BC%89%E7%9A%84%E4%B8%A4%E4%B8%AA%E5%AE%9E%E6%95%B0%E6%A0%B9%E5%88%86%E5%88%AB%E4%B8%BAx1%E5%92%8Cx2%EF%BC%8C%E9%82%A3%E4%B9%88x1%2Bx2%3D%E2%80%94b%2Fa)
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