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二次根式是学生熟悉的代数内容,在初中代数中占有一定的比重,但是二次根式因为双重非负性的特性,同时也渗透数学思想,所以应用起来有一定的灵活度。在数学研究和数学应用中,它不但可以使抽象复杂的数量关系通过二次根式直观地表现出来,也可以使性质通过数量间的计算、分析得到更加完整、严密和准确的表述。
The secondary root is the algebraic content that students are familiar with, and it occupies a certain proportion in the junior middle school algebra. However, the secondary root type has a certain degree of flexibility due to its dual nonnegative nature and penetrating mathematical thinking. In mathematics research and mathematics application, it can not only make the abstract and complex quantitative relationship be expressed intuitively through the secondary roots, but also make the nature obtain a more complete, rigorous and accurate representation through the calculation and analysis between the numbers.