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关于一元二次方程根与系数的关系问题 ,一直是初中数学中的热点问题 .这里谈谈给定方程两根满足某种非对称的条件式时 ,如何确定一元二次方程中字母系数的取值范围 (或值 )的问题 .例 1 (2 0 0 2年重庆市中考题 )已知ｘ1 、ｘ2 是关于ｘ的方程ｘ2 -ｋｘ+ 5 (ｋ -5 ) =0的两个
The question of the relationship between the root and the coefficient of the quadratic equation has always been a hot issue in junior mathematics. Here we talk about how to determine the letter coefficient of a quadratic equation when two equations of a given equation satisfy some asymmetrical conditional formula. The problem of value range (or value). Example 1 (Chongqing exam in 2000) It is known that x1 and x2 are two equations about x, x2 - kx + 5 (k -5) = 0