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2006年的初中数学竞赛已经降下帷幕,暑期之中相对较为宽余,笔者翻阅了全国各地2006年的初中数学竞赛题———代数解答题,发现不外乎以下几种类型.现分类讲解如下,供数学爱好者参考.1与二次方程有关的解答题例1(全国初中数学联赛)已知关于x的方程x2+2(a+2b+3)x+(a2+4b2+99)=0无
The junior high school math competition in 2006 has come to an end. In the summer vacation, it was relatively lenient. The author reviewed the 2006 junior high school math contest questions throughout the country—the algebra solution question. The discovery was nothing more than the following types. The current classification is explained below. Reference for math enthusiasts. 1 Solution related to quadratic equation Example 1 (National junior high school mathematics league) Known equation about x x2+2(a+2b+3)x+(a2+4b2+99)=0