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一、教学目标知识与技能:1、经历探索二次函数与一元二次方程的关系的过程,体会方程与函数之间的关系.2、理解二次函数图象与x轴交点的个数与一元二次方程的根的个数之间的关系.过程与方法:经历类比、发现、归纳的探索过程,体会函数与方程相互转化的数学思想和数形结合的数学思想。情感与态度:培养良好的合作意识,体验探究的乐趣,学会用辨证的观点看问题。二、重点难点
First, the teaching objectives and skills: 1, experience to explore the relationship between the quadratic function and the quadratic equation of the process, experience the relationship between equations and functions.2, to understand the quadratic function of the image and the x-axis intersection with the number and The relationship between the number of roots of a quadratic equation Process and method: Experience the exploration process of analogy, discovery and induction, understand the mathematics thought that the function and the equation transform each other, and the mathematics thought of the combination of number and form. Emotions and Attitudes: Develop a good sense of cooperation, experience the fun of inquiry, and learn to use dialectical perspectives to see problems. Second, the key difficulties