Entertaining algebra. Perelman Yakov Isidorovich

Why does the construction of a number simplify the life of astronomers? Why do we need algebraic equations? How to calculate using algebra, can the rocket fly to the moon? What is the connection between logarithms and the composition of music? You will find answers to these and many other questions in the "Entertaining Algebra." Excursions in the history of mathematics are interspersed in a book with fascinating algebraic tasks, examples and equations, and after each task a solution is given with detailed explanations. The chapters are separated by thematically - equations, progression, etc. - And complemented by explanatory illustrations. The book is useful to both parents and children, as well as to everyone who wants to refresh the algebra school course.