初学二次根式,由于对有关概念和性质理解得不深不透,往往出现这样或那样的错误。为帮助同学们学好这部分内容,本文举例说明学习二次根式应注意的几个问题,供参考。 The secondary roots of beginners, due to the incomprehensible understanding of the concepts and nature, often occur in one way or another. In order to help the students to learn this part of the content, this article gives an example of several issues that should be noted for learning secondary roots for reference.