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现实生活中存在着大量的可以通过列一元二次方程来解决的实际问题。解答此类问题的关键是在理解题意、分析数量关系的基础上,正确找出应用题中数量间的相等关系。一、商品销售利润问题例1某工厂生产的某种产品按质量分为10个档次,第一档次(最低档次)的产品一天能生产76件,每件利润10元。每提高一个档次,每件
In real life, there are a large number of practical problems that can be solved by the quadratic equation of a column. The key to solving such problems is to correctly find out the equal relationship between the quantities of the applied questions based on understanding the questions and analyzing the quantitative relationship. First, the sale of goods profit problem Example 1 a factory production of a product by quality is divided into 10 grades, the first grade (lowest grade) of the product can produce 76 pieces a day, each profit of 10 yuan. Every time you raise a grade, each piece