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![[Class 9] Let us try to expand (5x + 2y)^2 - Ganita Manjari Part 1 - Visualising Algebraic Identities](https://cdn.teachoo.com/acbde474-9be9-4493-b332-160d13653f3b/slide26.jpg)
Example 3 - Chapter 4 Class 9 - Exploring Algebraic Identities (Ganita Manjari I)
Last updated at May 15, 2026 by Teachoo
Class 9
Chapter 4 Class 9 - Exploring Algebraic Identities (Ganita Manjari I)
- Consecutive Square Numbers
-
Visualising Algebraic Identities
- Exercise Set 4.1
- Factorisation of Algebraic Expressions Using Identities
- Exercise Set 4.2
- More Identities
- Exercise Set 4.3
- Rewriting a2 - b2 Identity
- Factorisation Using Algebra Tiles
- Factorisation by Splitting the Middle term
- Exercise Set 4.4
- Finding New Algebraic Identities
- Simplifying Rational Expressions
- Exercise Set 4.5
- Word Problems
- End-of-Chapter Exercises
Transcript
Example 3 Let us try to expand (5𝑥+2𝑦)^2 (5𝑥+2𝑦)^2 Using (𝑎+𝑏)^2=𝑎^2+𝑏^2+2𝑎𝑏 Putting 𝑎 = 5𝑥 & 𝑏 = 3𝑦 =(𝟓𝒙)^𝟐+(𝟐𝒚)^𝟐+𝟐" × " 𝟓𝒙 × 𝟐𝒚 =5^(2\ ) × 𝑥^2+2^2 × 𝑦^2+2 × 5 × 2 × 𝑥𝑦 =𝟐𝟓𝒙^𝟐+𝟒𝒚^𝟐+𝟐𝟎𝒙𝒚
