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从近几年全国各地的中考试题可以看出,一元二次方程始终是中考命题的重点内容,主要考点是这三大类问题:一元二次方程的根与解法,一元二次方程根的判别式以及根与系数关系的简单运用,列一元二次方程解应用题(主要为工程类、方案设计类及决策类问题).下面结合典型的中考试题和模拟试题,重点解析与一元二次方程的根有关的中考问题.
It can be seen from the middle school entrance examination questions all over the country in recent years that the quadratic equation of one dollar is always the key content of the senior high school entrance examination thesis. The main test questions are the three major types of problems: the root solution of the quadratic equation and the root discrimination of the quadratic equation Type and root and coefficient of the simple application column quadratic equation solution application problems (mainly engineering, program design and decision-making class problems) with the following typical test questions and simulation questions, focusing on analysis and the quadratic equation The root of the senior high school entrance examination questions.