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