Class 8 Mathematics: Algebraic Expressions and Identities | Part - 3

In this lecture Kunal sir is going to teach you about Algebraic expression and identities. Topics covered in this lecture are- •Variables and constants •Types of expresssions •Multiplication of algebraic expressions •Standard identities An algebraic expression is a combination of variables, constants, and operations like addition, subtraction, multiplication, and division. An identity is an equality that holds true for all values of the variables involved Algebraic Expression Variable Constant Coefficient Term Like Terms Unlike Terms Monomial Binomial Trinomial Polynomial Degree of Expression Addition of Algebraic Expressions Subtraction of Algebraic Expressions Multiplication of Algebraic Expressions Product of Monomials Product of Binomials Expansion Identity Standard Identities (a + b)² = a² + 2ab + b² (a - b)² = a² - 2ab + b² a² - b² = (a + b)(a - b) (x + a)(x + b) = x² + (a + b)x + ab (a + b + c)² = a² + b² + c² + 2(ab + bc + ca) Simplification Substitution Evaluation of Expression Identity Verification Expansion Using Identities