一元二次方程是初中方程中的枢纽,是训练思维的好题型,是历届初中数学竞赛命题采撷的对象,为了使同学们熟悉有关解题的方法与技巧,现把在竞赛中常用到的几种方法归纳如下: 一、求根法:如果求方程有、无有 The one-dimensional quadratic equation is the pivot in the junior high school equations. It is a good question for training thinking, and it is the subject of all previous junior high school math contest propositions. In order to familiarize the students with the methods and techniques for solving problems, it is commonly used in the competition. Several methods are summarized as follows: First, the root method: If you find the equation there are, there is no