## CBSE Revision Notes Class 8 Maths Chapter 9: Algebraic Expressions and Identities

CBSE Revision Notes Class 8 Maths Chapter 9 Algebraic Expressions and Identities are provided to help the students understand and revise the concepts right from the beginning. The concepts taught in Class 8 are important to be understood as these concepts are continued in classes 9 and 10. To score good marks in Class 8 mathematics examination, it is advised to solve questions provided in the Revision Notes Class 8 Maths Chapter 9. These revision notes for Class 8 Maths help the students to revise all the concepts in a better way.

**Swiflearn** provides Revision Notes and keynotes chapter wise for the CBSE board exam in an easy-to-understand, free downloadable PDF format so students can use it for their studies and score better in their board exams. The CBSE Class 8 Revision Notes are made for the main subjects of Science and Maths. These core subjects are very critical as they are the stepping stones and plays a crucial role in student’s future. They might be tricky for students. The CBSE Class 8 Revision Notes for each chapter will enable them to have an expert studying pattern with which they can enjoy learning the subject and perform better in the exams.

CBSE Class 8 Maths Revision Notes are designed keeping in my mind the exam pattern and syllabus of NCERT 2020-21. Students can download the PDF for free and practice the questions to score well in the coming exams.

## CBSE Revision Notes Class 8 Maths Chapter 9: Algebraic Expressions and Identities

**What are Expressions?**

An algebraic expression is an expression built up from integer constants, variables, and the algebraic operations (addition, subtraction, multiplication, division and exponentiation by an exponent that is a rational number). Example: x + 3, 2y – 5, 3×2, 4xy + 7 etc.

**Terms, Factors and Coefficients:-**

Suppose we take an algebraic expression 4x + 5. In this expression 4x and 5 are called terms. These terms can be formed as product of factors such as 4x is the product of its factors 4 and x. The term 5 is made up of only one factor that is 5.

The numerical factor of the terms are called coefficients. Here in the term 4x the coefficient is 4.