Algebra . Textbook for students of 9th grade with advanced study of mathematics", written by the author's team as part of Vilenkin N. I. , Survillo G. C. , Simonov A. C. by A. and . It is not just a textbook, but a real find for everyone who seeks to understand the world of numbers and formulas more deeply. This textbook will become a reliable companion for students who want not only to master the school curriculum, but also to prepare for more complex mathematical tasks that await them in high school and in exams. From the first pages of the book, the reader encounters thoughtful and logically constructed material that covers all the key topics of algebra required for grade 9. The authors pay special attention not only to theoretical aspects, but also to practical tasks, which allows students to consolidate their knowledge . Each chapter begins with a clear explanation of new concepts, followed by examples and assignments that contribute to a deeper understanding. The textbook also includes a variety of exercises that will help develop logical thinking and analytical abilities. The book will be especially interesting for those who are fond of mathematics and want to develop their skills to the level that allows them to participate in olympiads or competitions. It is suitable for both self-study and classroom work under the guidance of a teacher. Students seeking an in-depth study of mathematics will find in this textbook many useful materials that will help them not only to prepare for exams, but also to expand their horizons in the world of numbers. The topics covered in the textbook cover a wide range of algebraic concepts: from simple equations and inequalities to complex systems of equations and functions. The authors emphasize the importance of the practical application of algebra in real life, which makes the study of the subject more exciting and relevant. Each topic is illustrated with vivid examples, allowing students to see how algebra permeates everyday life and scientific research. The style of the authors is distinguished by clarity and accessibility, which makes the material understandable even for those who encounter algebra for the first time. Vilenkin N. I. and its co-authors are known for their textbooks, which have long established themselves as reliable sources of knowledge. Their previous works, such as "Algebra. Textbook for grades 7-8" and "Geometry . Textbook for Grade 9", was also highly appreciated by both students and teachers. Algebra . A textbook for 9th grade students with advanced study of mathematics” will be an excellent choice for students seeking a deep understanding of mathematics and wishing to prepare for future challenges. It is suitable for both schoolchildren and parents who want to help their children in their studies .. The textbook will not only help to master algebra, but also inspire further study of mathematics, opening the door to new knowledge and opportunities. If you are looking for a quality algebra textbook that combines theory and practice, then this edition is exactly what you need. Do not miss the chance to immerse yourself in the fascinating world of algebra with Algebra . A textbook for students of the 9th grade with an in-depth study of mathematics!