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一元二次方程的应用是中考命题的热点之一.纵观近几年的中考题,主要有以下几方面的应用:一、增长率问题例1(2011年广安卷)广安市某楼盘准备以每平方米6000元的均价对外销售,由于国务院有关房地产的新政策出台后,购房者持币观望,房地产开发商为了加快资金周转,对价格进行两次下调后,以每平方米4860元的均价开盘销售.(1)求平均每次下调的百分率;(2)某人准备以开盘价均价购买一套100平方米的住房,开发商给予两种优惠方案以供选择:①打9.8折销售;②不打折,一次性
The application of a quadratic equation is one of the hot spots in the senior high school entrance examination exams. In recent years, the examination questions, mainly in the following aspects: First, the growth rate of cases 1 (Guang’an Juan in 2011) The average price of 6,000 yuan per square meter of foreign sales, due to the State Council on the introduction of new real estate policies, home buyers hold the money wait and see, real estate developers in order to speed up the cash flow, the price twice after the reduction of 4860 yuan per square meter (1) find the average percentage of each reduction; (2) a person is prepared to buy a 100 square meters of housing at the average opening price, developers offer two kinds of concessions: ① 9.8 Discount sales; ② do not discount, one-time