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不少同学初学二次根式时,对有些化简和计算的问题感到束手无策,其实只要经过认真审题,针对题目的类型,从中找出形式和数量上的特点,选用恰当的化简技巧,往往就能达到化繁为简,化难为易的目的,从而收到意想不到的效果.现举例如下.
When many students began to learn secondary roots, they felt helpless in some problems of simplification and calculations. In fact, as long as after careful examination, the types of questions were searched for, the types and quantitative characteristics were selected, and appropriate simplification techniques were often used. It can achieve the purpose of simplifying and simplifying and making it difficult to achieve the unexpected effect. The example is as follows.