Properties of arithmetic square roots and transformations of expressions containing them.

The guide you're looking for refers to the famous Soviet/Russian mathematics problem sets by . These materials, specifically the 1994/1995 versions for the 8th grade, are widely used in schools for independent work and tests covering algebra and geometry. Overview of the Collection

от Шестакова А.П. - в 1995 году - Ягубов.РФ

Shestakov's 8th-grade collection is usually organized by "Type" (e.g., Type 1, Type 2, etc.). Each type corresponds to a specific mathematical topic.

If you are searching online, use the keywords "Шестаков 8 класс самостоятельные работы" as this is how the collection is most commonly titled in digital archives.