Ex 2.4, 4 (i) - Chapter 2 Class 9 Polynomials (Important Question)

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Ex 2.4, 4 Expand each of the following, using suitable identities: (x + 2y + 4z)2 (x + 2y + 4z)2 Using (a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ac Where a = x , b = 2y, c = 4z = x2 + (2y)2 + (4z)2 + 2(x) (2y) + 2(2y) (4z) + 2 (4z) (x) = x2 + 4y2 + 16z2 + 4xy + 16yz + 8xz

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