They are using legacy practice problems that remain relevant for general mathematical understanding. Important Note
This was one of the "pioneer" websites for student solutions. While many students used it to quickly copy answers, many others used it as a self-check tool to understand complex problem-solving steps. gdz po algebre spishu.ru makarychev 9 klass 2010 god
I can certainly help you understand the context of that specific search query. They are using legacy practice problems that remain
Yu. N. Makarychev’s algebra textbooks are a standard for Russian middle schools. The 9th-grade curriculum typically covers quadratic functions, equations and systems of equations, power functions, and elements of combinatorics and probability. equations and systems of equations
They are looking for a that was explained more clearly in older pedagogical manuals.
They are using a of the book provided by a school library.