Assessing Student Skills: Research on Algebraic Complex Number Mastery Through Learning Experience

The problem faced in this study is the mistake that students often make in solving complex number algebra problems, which is caused by a lack of basic understanding of the mathematical operations involved. This study aims to analyze the types of errors that occur and the factors that affect these errors. The method used is descriptive qualitative analysis, with data collection through giving questions to students and interviews to explore the reasons behind the mistakes made. The results show that the main errors stem from inaccuracy in the operations of addition, subtraction, and multiplication of complex numbers, as well as mistakes in simplifying algebraic expressions. The interviews revealed that his lack of practice, confusion in understanding basic concepts, and limited time to work on questions also contributed to the error. In conclusion, to reduce these errors, students need to be given a deeper understanding of the basic concepts of complex number algebra and given more varied practice problems. Therefore, it is important to develop teaching methods that focus more on strengthening basic concepts and familiarizing students with more diverse questions.