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构造法是数学解题的重要方法和技巧,在解决一些与二次根式有关的竞赛题时,若能根据已知式子的结构和特征,运用构造法构造出相应的式子或图形,则往往能减少运算量,简化
The construction method is an important method and skill for solving problems in mathematics. When solving some contest problems related to the secondary root formula, if the corresponding formula or figure can be constructed by using the construction method according to the structure and characteristics of the known formula, then Can often reduce the amount of computation and simplify