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思维能力是多种能力的核心,素质教育的主要任务就是培养同学们的思维能力和创新意识.现举几例,加以说明. 例1 已知a-b=4,ab+c2+4=0,求a+b的值. 分析:此题按常规思路,可联立方程组求出a、b的值,进而得出a+b的值,若仔细观察两个方程的结构,可简捷解答:解:∵a-b=4
Thinking ability is the core of multiple abilities. The main task of quality education is to cultivate the students’ thinking ability and innovation consciousness. Here are a few examples to illustrate. Example 1 It is known that ab=4, ab+c2+4=0. The value of a + b. Analysis: According to the conventional idea of this question, the values of a and b can be obtained by the simultaneous equations, and the value of a+b can be obtained. If the structure of the two equations is carefully observed, the solution can be simply and conveniently answered: Solution: Ab=4