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一元二次方程根的变换,指的是利用根的意义进行恒等变形,求参数值或代数式值的一种解题方法. 现选取几道有关的中考或竞赛试题,予以分析(analyse).
The transformation of the root of the unary quadratic equation refers to a method of solving the problem by using the meaning of the root to perform the constant deformation and finding the parameter value or the algebraic value. Now select several relevant examinations or contest questions to analyze it.