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Write the following cube in expanded form:- (2x + 1)^3 - CBSE Class 9 - Mathematics

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Question

Write the following cube in expanded form:- (2x + 1)3 

Solution

It is known that,

(a + b)3 = a3 + b3 + 3ab(a + b)  and  (a - b)3 = a3 - b3 - 3ab(a - b)

(2x+1)3 (2x)3+13+(3×2x×1)(2x+1)

             = 8x3+1+6x(2x+1)

             = 8x3+12x3+6x+1

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Solution Write the following cube in expanded form:- (2x + 1)^3 Concept: Algebraic Identities.
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