一、内容解析《二次根式》是苏科版九年级上册第三章第一节的内容,是《数学课程标准》中“数与代数”领域的重要内容.它与已学内容“实数”“整式”“勾股定理”联系紧密,同时也是以后将要学习的“解直角三角形”、“一元二次方程”和“二次函数”等内容的重要基础,并为学习高中数学中的不等式、函数以及解析几何等知识作好准备. First, the content analysis “Secondary root” is the Su Ke version of the ninth grade on the third chapter of the first quarter of the content is “mathematical curriculum standards” in the “number and algebra ” an important part of the field it has learned content “Real number ” “whole ” “Pythagorean theorem ” close contact, but also later to learn “right angle triangle ”, “quadratic equation ” and “quadratic function ” and so on Content, and prepare for learning about inequalities, functions, and analytic geometry in high school mathematics.