To help with your search for a legal copy, here are the book's unique identifiers:

Pure Mathematics 2 by Backhouse covers various topics, including algebra, calculus, and geometry. The book provides detailed explanations, examples, and exercises to help students grasp complex mathematical concepts. The author's approach is systematic and logical, making it easier for readers to follow and understand the material. The book is widely used in schools and universities, particularly in the UK, as a textbook for A-level mathematics and other advanced math courses.

3x3 determinants, Cramer’s rule, and the inverse of a 3x3 matrix. Series & Calculus:

While some modern syllabuses have shifted focus, Backhouse remains a "definitive course" for those seeking a deep, substantial understanding of the subject. It is frequently cited as a valuable resource for finding additional, high-quality practice questions that go beyond standard modern textbooks. Where to Find it Online