数学家华罗庚曾说过:“数缺形时少直观,形少数时难入微,数形结合百般好,隔离分家万事休”.数形结合是中学数学的一种重要思想方法,对某些代数问题,通过数中思形,数形结合,借助直观可以迅速、准确地找到解题的途径.对于代数式 Mathematician Hua Luogeng once said: “Number lack of shape less intuitive, shaped when the few are hard to find, the combination of good and bad shape, isolation of all things off. ” Combination of several forms of mathematics is an important way of thinking, Some algebra problems, through the number of ideas, the number of forms, with the help of intuition can quickly and accurately find ways to solve the problem. For algebraic