Ex 2.4, 4 (iii) - Chapter 2 Class 9 Polynomials

Last updated at Dec. 16, 2024 by

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Ex 2.4, 4 Expand each of the following, using suitable identities: (iii) (-2x + 3y + 2z)2 ( 2x + 3y + 2z)2 = (( 2x) + 3y + 2z)2 Using (a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ac Where a = -2x , b = 3y, c = 2z = (-2x)2 + (3y)2 + (2z)2 + 2(-2x) (3y) + 2 (3y) (2z) + 2 (2z) (-2x) = 4x2 + 9y2 + 4z2 12xy + 12yz 8xz

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo