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一元二次方程是中学数学的主要内容,在初中代数中占有重要地位,学生已学习了实数、代数式、一元一次方程(包括可化为一元一次方程的分式方程)和二元一次方程组,这些知识和技能是学好一元二次方程内容的基础,也是对上述内容的巩固、加深;同时一元二次方程为后续学习的函数、一元二次不等式以及指数方程、对数方程、三角方程、二次曲线内容等扫清学习上的障碍,总之,本章教学内容起到了承前启后的作用。
The one-dimensional quadratic equation is the main content of middle school mathematics, which occupies an important position in junior middle school algebra. Students have studied real numbers, algebraic equations, one-dimensional equations (including fractional equations that can be converted into a unitary equation), and binary equations. These knowledge and skills are the basis for learning the contents of the quadratic equation, and they are also the consolidation and deepening of the above content. At the same time, the quadratic equation is a function of follow-up learning, a quadratic inequality and exponential equations, logarithmic equations, triangular equations, and two The content of the sub-curves etc. clears the obstacles in learning. In short, the teaching content of this chapter has played a role in the past.