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

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

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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