复数是实数的扩展 ,复数集的建立 ,完善了数集理论 ,为我们提供了新的解决现实问题的思路与方法 .高中代数课本第八章复数的内容主要包括 :复数的概念、运算和简单应用 .其重点是概念和运算 .1　复数定义的多样性复数的定义有三种形式 ,即代数形式、向量 (几何 )形式、三角形式 Plurality is the expansion of real numbers, the establishment of complex sets, and the improvement of the theory of number sets. It provides us with new ideas and methods for solving practical problems. The contents of plural numbers in high school algebra textbooks include the concept, operation, and simplicity of plural numbers. Applications. The emphasis is on concepts and operations.1 Complexity of complex definitions There are three forms of definitions of complex numbers, ie, algebraic forms, vector (geometric) forms, triangular forms