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本文就韦达定理在整个初中数学中的各个方面的应用,力图较全面、较系统地进行一次归纳,供大家教学时参考。一、应用于解决与一元二次方程有直接关系的一些问题。这方面的应用,现行教材有足够数量的题型,归结起来不外有这么几种:①用于求一元二次方程有关的某些代数式的值;②用于作出具备某种条件的一元二次方程;③用于探求一元二次方程根与根、根与系数或者
In this paper, the application of Weddah’s theorem in all aspects of mathematics in junior middle school is attempted to be summarized in a more comprehensive and systematic way for everyone to refer to. First, it is used to solve some problems that have a direct relationship with the quadratic equation. For this application, there are a sufficient number of questions in the current textbook. There are only a few of them: 1 Some algebraic values used to find a quadratic equation; 2 Used to make a one-two with certain conditions. The second equation; 3 is used to find the root and root, root and coefficient of a quadratic equation or