Ex 2.4, 6 (ii) - Chapter 2 Class 9 Polynomials

Last updated at August 10, 2026 by

Ex 2.4, 6 (ii) - Write the cube (2a - 3b)^3 in expanded form [Video] - Ex 2.4

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Ex 2.4, 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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