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Ex 2.5,6 - Chapter 2 Class 9 Polynomials - Part 3

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Ex 2.5, 6 Write the following cubes in expanded form: (iii) (3/2 +1)^3 (3/2 +1)^3 Using (a + b)3 = a3 + b3 + 3ab(a + b) Where a = 3/2x & b = 1 = (3/2 x)^3 + (1)3 + 3 (3/2 x)(1) (3/2 x+1) = 27/8 x3 + 1 + 9/2 x (3/2 x+1) = 27/8 x3 + 1 + 9/2 x (3/2 " x" ) + 9/2 x (1) = 27/8 x3 + 27/4 x2 + 9/2 x + 1

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