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BrainMass Need to Know Academic Help eBooks!

BrainMass Need to Know eBooks are printable PDF documents that offer detailed explanations of specific topics of interest. Each book is authored by an expert on the subject and offers summary information, step-by-step explanations, answers to common questions, and additional resources for further study.

Our authors hail from the best graduate schools in the world. All BrainMass eBooks are focused on a particular topic, ensuring that the content will be useful as well as applicable and practical. They are a fantastic resource for all students looking to improve their grades, or for anyone looking to improve their know-how.

What's Included?

What's Included in a Need to Know eBook

BrainMass "Need to Know" eBooks provide you with study-ready explanations of key concepts and ideas. Our books are authored by our Experts, who are also available to answer questions. Here's a quick rundown of what each of our academic eBooks features:

A Useful Introduction to the Concept

Each Expert takes the time to explain the nature of the concept, where it comes from and why it's relevant for those studying that subject. Often, a real-world example of why it's important is included. Our introductions "set the stage" for you to read on and learn everything you "need to know."

Key Points in their own Sections

Each "Need to Know" eBook will be broken down into a few different sections. Each individual section will be dedicated to one aspect of the book's topic, which when put together, will ensure you have a full understanding of the topic at hand.

Diagrams & Illustrations

Many of our Experts will include illustrations and visual aids to enhance their eBooks. Often, having a diagram can really help in making something easy to understand, so we encourage our authors to use them as much as they can.

A Glossary of Key Terms

Every subject of study has terms and expressions that are unique to that field. Our "Need to Know"  eBooks help by providing a list of the most common terms and a definition for each one.

Additional Resources & References

Those students who are looking for more information will always have a place to continue their research. Our Experts will provide you with helpful and interesting links that will expand your understanding of the topic in question.

BrainMass Need to Know academic eBooks are not only a fantastic way to get explanations of troublesome topics, but they also provide a great place to start studying a topic that's coming up in a class.

Remember that if you have any comments or suggestions about our eBooks, we'd love to hear about it. Just send an email to

Dimensional Analysis

Zach Hartman, PhD (#107608)

Converting units using dimensional analysis is one aspect of chemistry that tends to give students trouble in the beginning stages of their education. It is the goal of this book to provide a simple pathway to mastering this extremely useful techniq READ MORE »

13 Pages | 1,900 Words

Significant Figures

Zach Hartman, PhD (#107608)

Significant figures can be rather difficult for students to grasp. Why are they important? How are they used? The answers to these questions are not always readily understandable because they relate to practical lab aspects that are not always tau READ MORE »

17 Pages | 2,034 Words


David Terr, PhD (#109641)

This book teaches students the basics of differentiation, which is a large part of first-year calculus. The student is first instructed on how to compute derivatives of most elementary functions. Next, the student is taught basic rules for differenti READ MORE »

40 Pages | 3,205 Words

Linear Equations

David Terr, PhD (#109641)

The main focus of this book is how to solve general systems of linear equations. It also touches on matrices, but does not include more advanced topics in linear algebra, such as determinants, vector spaces, linear transformations, eigenvalues and ei READ MORE »

83 Pages | 14,262 Words

Complex Numbers

John Gillis, PhD (#110764)

This book is a study guide for the set of complex numbers and basic operations on complex numbers. The imaginary unit i and the complex numbers are defined. Plotting numbers on the complex plane and representing complex numbers as vectors is illustr READ MORE »

30 Pages | 3,330 Words

Polynomial Equations

John Gillis, PhD (#110764)

This book is a study guide for solving polynomial equations. As a prelude to this topic, polynomial functions are graphed and discussed. The different factoring techniques of polynomials are also covered and later used to solve equations. The secon READ MORE »

33 Pages | 3,796 Words

Quadratic Equations

John Gillis, PhD (#110764)

This book is a study guide and review for solving quadratic equations. As a prelude to this topic, quadratic functions are graphed and the different forms of quadratic functions are discussed and related to the graph. The second section shows four d READ MORE »

29 Pages | 2,939 Words

Game Theory in Economics

Cheryl Sedlacek, MS (#105382)

This book describes the development, uses, and implications of game theory in economics. Game theory is the systematic exploration of interactive, strategic decision-making. As such, it has applications in many fields, including biology, psychology, READ MORE »

31 Pages | 8,087 Words