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换元法是初中数学学习中解决较为复杂的数学问题的重要方法之一。解方程的方法很多,如:开平方法、配方法、公式法、因式分解法、换元法等方法,应根据题目的特点可以采用适当方法。灵活地运用换元法解方程,可以化难为易,化繁为简。是学生解决问题的能力的重要体现。用换元法解方程,关键在于换元,下面浅谈这个问题,望能引起同学们的兴趣和重视。
The replacement method is one of the important methods to solve the more complex mathematical problems in junior middle school mathematics learning. There are many ways to solve equations, such as: Kaiping method, matching method, formula method, factorization method, replacement method, etc., and appropriate methods should be used according to the characteristics of the topic. The flexible use of the yuan-changing method to solve equations can make it difficult to make things easier and more complicated. It is an important manifestation of students’ ability to solve problems. The key to solving the equation with the substitution method is to replace the yuan. The following discussion of this issue will hopefully arouse the students’ interest and attention.