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高中第三册代数課本关于一元二次方程的应用題的求解与討論只給出一定数量的习題与复习題,并未列举范例,而这一部分的內容,正是教学中感到較难处理的。有关的参考資料,对这方面的介紹也有不足之处.現就管見所及,拟举数例,以供参考。例1.把一个正方体的长、寬、高都增加1厘米,所得的新的正方体的体积比原正方体的体积大a立方厘米(a>0),求原正方体的体积(习題42.第14題)。
The third-generation algebra textbook of high school solves and discusses the application of the quadratic equation of one yuan. Only a certain number of exercises and review questions are given, and no examples are listed. The content of this part is exactly what is difficult to handle in teaching. . The relevant reference materials are also inadequacies in the introduction of this aspect. At present, I have read through my opinion that several examples are proposed for reference. Example 1. Increase the length, width, and height of a cube by 1 cm. The volume of the new cube obtained is a cubic centimeter (a>0) larger than that of the original cube, and the volume of the original cube is calculated (Exercise 42. 14 questions).