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二次根式(特别是含有字母的二次根式)的化简与计算,常由于对概念理解不深刻,或者疏忽大意,导致解题失误.现剖析几例,以提高认识,防止类似的错误发生.
The reduction and calculation of the quadratic forms (especially the quadratic forms containing letters) often lead to mistakes in solving problems due to not profound understanding of the concepts or negligence. Several examples are now being analyzed to raise awareness and prevent similar errors from occurring .