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一元二次方程根与系数的关系是初中代数的一个重点,也是命题者设计“误区”的热点.许多同学由于概念不清,思路不周密,常走入“误区”.为了帮助同学们避开“误区”,现归纳分析如下:
The relationship between the root and coefficient of the quadratic equation of one yuan is a key point of the junior high school algebra, and it is also a hot point for the propositioner to design the “misunderstanding”. Many students often enter the “misunderstanding” due to their unclear concepts and poor thinking, in order to help the students avoid the students. The “misunderstanding” is summarized as follows: