一元二次方程的应用

• 作 者: 许必年
• 出 处: 初中生必读
• 发表日期: 2004年期
• 关键词: 一元二次方程 求根公式 代数的 元二 正整数 一奇一偶 实数解 孙二 力人 田根

一元二次方程是初中代数的重要内容之一,应用较多的知识是一元二次方程的求根公式、根的判别式和根与系数的关系.实际解题时,还常常需要与其他数学知识综合运用,如整数的性质、平面几何知识,以及构造一元二次方程解题等.下面举例介绍这几方面的应用.

One quadratic equation is one of the important contents of junior high school algebra, the more applied knowledge is the rooting formula of the quadratic equation, the discriminant of root and the relationship between root and coefficient.When the problem is actually solved, it is often necessary to combine with other mathematics The comprehensive use of knowledge, such as the nature of integers, plane geometry knowledge, as well as the construction of a quadratic equation solution, etc. The following examples illustrate the application of these aspects.