二次根式的运算是中学代数中的一个难点,不少题目用常规方法去解比较繁琐。所以解题中要根据题目的特点,巧用一些运算技巧,才能达到事半功倍之效。现举几例。一、活用乘法公式某些根式计算题初看不具备公式特征,但稍加变形,便可运用 The secondary root-based operation is a difficult point in middle school algebra, and many problems are more complicated with conventional methods. Therefore, according to the characteristics of the topics in the problem-solving problem, skillful use of some computing skills can achieve a multiplier effect. Here are some examples. First, the use of multiplication formula Some root calculation problems do not have the formula features, but a little deformation, you can use