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เนื้อหาย่อ : ABOUT THIS BOOK This book was written to provide a solid foundation in algebra for students who might have had no previous experience in algebra. Specific care has been taken to prepare students to go on to their next course in mathematics, and to help students to succeed in nonmathematical courses that require a grasp of algebraic fundamen- tals. I have tried to achieve this by writing a user-friendly text that is keyed to ob- jectives and contains many worked-out examples. The basic concepts of graphing are introduced early, and applications, data interpretation, and geometric concepts are emphasized and integrated throughout the book. The many factors that contributed to the success of the first edition have been retained. In preparing this edition, I considered the comments and suggestions of colleagues throughout the country and of the many users of the first edition. The AMATYC Crossroads Document and the NCTM Standards (plus Addenda), to- gether with advances in technology, also influenced the careful reexamination of every section of the text. All of these inputs helped to update the presentation, en- hancing the content and pedagogical value. KEY PEDAGOGICAL FEATURES IN THE SECOND EDITION Readability and Connections Many reviewers of this edition as well as users of the previous edition have commented favorably on the readability and clear, organized presentation. I have tried to make the writing style as clear as possible while still retaining the mathematical integrity of the content. When a new topic is presented, an effort has been made to relate the new ideas to those the students may already know. Constant reinforcement and connections within problem-solving strategies, data interpretation, geometry, patterns, graphs, and situations from everyday life can help students gradually master both new and old information. Problem-Solving Process This is formally introduced in Chapter 2, with a new six- step process that is integrated throughout the text. The six steps are Understand,