Class 9 Maths Ch 4 Exercise 4.5 Introduction | Exploring Algebraic Identities | New NCERT 2026-27

Class 9 Maths Chapter 4 Exercise 4.5 Introduction | Exploring Algebraic Identities | New NCERT Syllabus 2026-27 Welcome to Maths With Anitya Shukla! In this video, we cover the complete introduction to Exercise 4.5 from Class 9 Mathematics Chapter 4: Exploring Algebraic Identities (New NCERT Syllabus). Mastering cubic identities often confuses students with plus/minus sign mistakes. In this session, you will learn the step-by-step logic, easy derivations, and practical memory tricks so you never have to memorize them blindly again! 📌 Topics Covered in this Lecture: ✔ Derivation of (a + b)³ and (a - b)³ ✔ Factorization using cubic identities ✔ Derivation of a³ + b³ and a³ - b³ ✔ Three-variable identity: a³ + b³ + c³ - 3abc ✔ Important examples & Word problems ✔ Simplifying rational algebraic expressions by splitting the middle term TIMESTAMPS: [00:00:00] Introduction to Exercise 4.5 [00:01:07] Derivation of Identity: (a + b)³ [00:06:27] Derivation of Identity: (a - b)³ [00:10:37] Example 1: Finding Side of Cube from Volume [00:17:15] Example 2: Factorizing Cubic Polynomials [00:20:48] Derivation & Formula of a³ + b³ & a³ - b³ [00:27:25] Special Identity: a³ + b³ + c³ - 3abc [00:29:37] Example 3: Finding Sum of Cubes (Word Problem) [00:37:55] Simplifying Rational Expressions (Middle Term Splitting) [00:46:00] Summary & Conclusion 🔔 Don't forget to LIKE, SHARE, and SUBSCRIBE for complete Class 9 Maths lectures according to the latest NCERT CBSE pattern! 💬 Leave your questions and doubts in the comments below. #Class9Maths #AlgebraicIdentities #Class9NCERT #MathsWithAnityaShukla #CBSEClass9 #NewNCERT #MathsTricks