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Ex 2.5,4 - Chapter 2 Class 9 Polynomials - Part 6

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Ex 2.5, 4 Expand each of the following, using suitable identities: (vi) (1/4 a 1/2 b+1)^2 (1/4 a 1/2 b+1)^2 = ((1/4 a)+( 1/2 b)+1)^2 Using (x + y + z)2 = x2 + y2 + z2 + 2xy + 2yz + 2zx Where x = 1/4 a , y= -1/2 b ,z = 1 = (1/4 a)^2+ ( 1/2 b)^2 + (1)2 + 2 (1/4 a) ( 1/2 b) + 2 ( 1/2 b)(1) + 2 (1/4 a) (1) = 1/16 a2 + 1/4 b2 + 1 - 1/4 ab b + 1/2 a

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