在初中数学教材中,经常出现求代数式值的问题,围绕着这个问题,解题的方法多种多样。一般的方法是先化简所求的代数式,再把未知数的值代入代数式中,从而求得此代数式的值。但对于一些高次代数式,用这种方法来解,往往使问题复杂化,从而给解题带来许多麻烦。 在这里,介绍一种利用隐含条件来降幂求高次代数式的值的方法。 In junior high school mathematics textbooks, often find the algebraic value of the problem around this problem solving a variety of ways. The general method is to first simplify the algebraic formula, and then take the value of the unknown into the algebraic equation to find the algebraic value. However, for some higher-order algebraic equations, solving the problem with this method often complicates the problem and causes a lot of trouble for solving the problem. Here, we introduce a method of using implicit conditions to reduce power to find higher-order algebraic values.