初学二次根式,在比较大小的问题上不能得心应手.在做练习时碰到这类题目总要踌躇许久.为此在课后我找了几道题,试着归纳比较二次根式大小的方法.两个简单的二次根式比较大小,可以用平方法、移动因式法、分母有理化法和分子有理化法,这些都是最简单实用的方法,也是大家比较熟悉的,但如果是两个复杂的二次根式,就需另寻解法,比如可以用下而的两种方法. Beginner secondary root type, the size of the problem can not be handy .In practice do encounter such problems always hesitated for a long time.Therefore, I found a few questions after class, try to sum up the method of comparing the secondary root size Two simple quadratic root comparisons, which are simple and practical, are those that are relatively simple and easy to use, but are easy to use. However, if you have two A complex secondary root, you need to find another solution, such as the following two methods can be used.