Is this the right book for me? Everything you need to broaden your skills and gain confidence Ideal whether you're meeting the subject for the first time or need to refresh your knowledge before an exam, Understand Algebra provides everything you need to broaden your skills and gain confidence. Assuming only a basic level of arithmetic, this carefully graded and progressive book guides you through the basic principles of the subject with the help of exercises and fully-worked examples. Understand Algebra includes: Chapter 1: The meaning of algebra Chapter 2: Elementary operations in algebra Chapter 3: Brackets and operations with them Chapter 4: Positive and negative numbers Chapter 5: Equations and expressions Chapter 6: Linear equations Chapter 7: Formulae Chapter 8: Simultaneous equations Chapter 9: Linear inequalities Chapter 10: Straight-line graphs; coordinates Chapter 11: Using inequalities to define regions Chapter 12: Multiplying algebraical expressions Chapter 13: Factors Chapter 14: Fractions Chapter 15: Graphs of quadratic functions Chapter 16: Quadratic equations Chapter 17: Indices Chapter 18: Logarithms Chapter 19: Ratio and proportion Chapter 20: Variation Chapter 21: The determination of laws Chapter 22: Rational and irrational numbers and surds Chapter 23: Arithmetical and geometric sequences . Learn effortlessly with a new easy-to-read page design and interactive features: Not got much time? One, five and ten-minute introductions to key principles to get you started. Author insights Lots of instant help with common problems and quick tips for success, based on the author's many years of experience. Test yourself Tests in the book and online to keep track of your progress. Extend your knowledge Extra online articles to give you a richer understanding of the subject. Five things to remember Quick refreshers to help you remember the key facts. Try this Innovative exercises illustrate what you've learnt and how to use it.