“数”与“形”是数学中的两个最基本的概念.每一个几何图形都蕴含着一定的数量关系,而数量关系又常常可以通过几何图形予以直观地反映和描述,所以数形结合也就成为研究数学问题的重要思想方法.下面结合具体例题给同学们说说数形结合思想在二次函数中的体现. “Number ” and “Shape ” are the two most basic concepts in mathematics.Each geometric figure contains a certain quantity relationship, and the quantitative relationship can often be intuitively reflected and described by the geometric figure, Therefore, the combination of several forms has also become an important way of thinking of mathematical problems.Considering the specific examples to the students to talk about the combination of the idea of ​​shape and shape in the quadratic function.