一、目标导航1.经历由实际问题抽象出一元二次方程的过程,进一步体会方程是刻画现实世界的有效数学模型;2.了解一元二次方程的概念和一般形式;3.会根据实际问题列出一元二次方程;4.在尝试、探索、比较等活动中,发现并掌握解一元二次方程的基本方法—直接开平方法、配方法、公式法、因式分解法; First, the target navigation 1. Experiencing the process of abstracting a quadratic equation from the actual problem, to further understand the equation is an effective mathematical model to characterize the real world; 2. Understand the concept and general form of quadratic equations; 3. Will be based on actual problems List quadratic equations; 4. Find and master the basic methods of solving quadratic equations in the attempt, exploration, comparison and other activities - direct Kaiping method, formula method, formula method, factorization method;