有些二次根式化简题,直接解答,或求解难或运算繁.若能灵活用一些策略,常能化繁为简,化难为易,收到事半功倍的效果,那么化简二次根式有哪些策略呢?一、恒等变形,简化运算1.巧用课本中未给出的公式.例如(a+b)2+(a-b)2=2(a2+b2) Some of the second radicalization of the problem, direct answer, or difficult to solve or complex operation .If the flexibility to use some strategies, often can be complicated, easy to change, receive a multiplier effect, then simplify the secondary root What Strategy? First, the same deformation, simplifying the operation 1. Accustomed to using textbooks are not given formula, such as (a + b) 2+ (ab) 2 = 2 (a2 + b2)