二次函数逆向最值问题,历来是高中数字的热点,因其复杂的解题步骤和烦琐的计算过程,使众多答题者望而却步,现介绍两种简化此类问题的方法. The inverse value of the quadratic function has always been the hot spot of the high school figures. Because of its complicated problem-solving steps and cumbersome calculation process, many respondents are discouraged. Now two methods to simplify such problems are introduced.