构造法是通过观察式子结构的外在特征,再利用适当的逻辑组合,构造出一种新的形式,从而使得数学问题熟悉化、解题思路清晰化的一种解题方法.其本质上是一种创造性思维,同时也是转化与化归思想的具体体现.一元二次方程是初中数学非常重要的知识内容,在高中阶段的学习中,起着承上启下的作用,所以,作为知识衔接点,依旧是一个值 Constructive method is through the observation of the external characteristics of the sub-structure, and then use the appropriate combination of logic to construct a new form, so that mathematic problems familiar with the problem-solving ideas clarity of a problem-solving method. In essence Is a creative thinking, but also a concrete manifestation of the transformation and the return to the idea.Unified quadratic equation is a very important knowledge of junior high school mathematics content, learning in high school plays a role in linking up and down, so, as a point of convergence of knowledge, Still a value