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一元二次方程的应用问题是近年来中考的重点考查内容,题目多以课本中的例题、习题为母题,实施适当的加工改造、融合拓展而成.请看下面的一些例子.例1(2012年滨州)滨州市体育局要组织一次篮球赛,赛制为单循环形式(每两队之间都赛一场),计划安排28场比赛,应邀请多少支球队参加比赛?学习以下解答过程,并完成填空.解:设应邀请x支球队参赛,则每队共打——
The application of the quadratic equation is the key examination content of the senior high school entrance examination in recent years. The subject is mostly based on the examples in the textbook, the exercises as the motif, the appropriate processing and transformation, and the integration and expansion. See some examples below. Example 1 2012 Binzhou) Binzhou Municipal Sports Bureau to organize a basketball match, the system for the single cycle form (between each two teams have a game), plan to arrange 28 games, how many teams should be invited to participate in the competition? Learn the following process of the answer , And fill in the blanks. Solution: Should be invited to play x team, then played a total of each team -