:要学会运用数学的思维方式去观察、分析现实社会,从数学的角度提出问题,理解问题,并能综合运用所学的知识和技能解决问题,发展应用意识,一元二次方程有许多贴近生活的实际应用,现举几例说明如下:一、以实用问题为背景例1有一间会议室,它的地板长为20m,宽为15m-: To learn to use mathematical way of thinking to observe, analyze social reality, from a mathematical point of asking questions, understand the problem, and can be integrated use of the knowledge and skills to solve problems, develop awareness of the application, a quadratic equation has many close to life practical application, now cite a few examples are as follows: First, a practical case of a problem as the background has a meeting room, its floor length 20m, width 15m