Ex 2.5,6 - Chapter 2 Class 9 Polynomials - Part 2

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  1. Chapter 2 Class 9 Polynomials (Term 2)
  2. Serial order wise

Transcript

Ex 2.5, 6 Write the following cubes in expanded form: (ii) (2a 3b)3 (2a 3b)3 Using (x - y)3 = x3 - y3 - 3xy(x - y) Where x = 2a & y = 3b = (2a)3 (3b)3 3(2a)(3b)(2a 3b) = 8a3 27b3 18ab (2a 3b) = 8a3 27b3 18ab (2a) 18ab ( 3b) = 8a3 27b3 36a2b + 54ab2

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.