Скачать или смотреть Class 9 Maths Chap 2 | Polynomial #24 | Ex 2.5 Q8 (v), Q9 & Q10 Class 9 Maths Ch 2 NCERT Solution

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✅ In this video,

✔️ Class: 9th
✔️ Subject: Maths
✔️ Chapter: Polynomials
✔️ Topic Name: Polynomials Full Chapter Explanation (Part 24)
✔️ Topics Covered in This Video: Full Chapter Explanation from Class 9 Maths Chapter 2 Polynomials
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2.6 Algebraic Identities
Identity I : (x + y)² = x² + 2xy + y²
Identity II : (x – y)² = x² – 2xy + y²
Identity III : x² – y² = (x + y) (x – y)
Identity IV : (x + a) (x + b) = x² + (a + b)x + ab
Identity V : (x + y + z)² = x² + y² + z² + 2xy + 2yz + 2zx
Identity VI : (x + y)³ = x³ + y³ + 3xy (x + y)
Identity VII : (x – y)³ = x³ – y³ – 3xy(x – y)
= x³ – 3x²y + 3xy² – y³
Identity VIII : x³ + y³ + z³ – 3xyz = (x + y + z)(x² + y² + z² – xy – yz – zx)

Exercise 2.5 Class 9 Maths Chapter 2 NCERT Solution

8. Factorise each of the following:
(v) 27p³ - 1/216 - (9/2)p² + (1/4)p
9. Verify :
(i) x³ + y³ = (x + y) (x² – xy + y²)
(ii) x³ – y³ = (x – y) (x² + xy + y²)
10. Factorise each of the following:
(i) 27y³ + 125z³ (ii) 64m³ – 343n³
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