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SAI International School
Class VIII

Mathematics
Chapter 9 ALGEBRAIC EXPRESSIONS & IDENTITIES
Lesson note-1
Subtopic: INTRODUCTION

MONOMIALS, BINOMIALS & POLYNOMIALS

Any mathematical expression which consists of numbers, variables and operations are
called Algebraic Expression.

FOR FURTHER DETAILS CLICK ON THE LINK GIVEN BELOW
1) Introduction

https://www.youtube.com/watch?v=lH7LWLBIuT4

1. Terms
Every expression is separated by an operation which is called Terms. Like 7n and 2 are
the two terms in the above figure.
2. Factors
Every term is formed by the product of the factors.7n is the product of 7 and n which
are the factors of 7n.
3. Coefficient
The number placed before the variable or the numerical factor of the term is
called Coefficient of that variable.7 is the numerical factor of 7n so 7 is coefficient
here.
4. Variable
Any letter like x, y etc. are called Variables. The variable in the above figure is n.
5. Operations
Addition, subtraction etc. are the operations which separate each term.

6. Constant
The number without any variable is constant. 2 is constant here.