Question

Expand using identity (3a-1/2)^3

Answer 1

Answer:

27a^3 - 1/8 - 27a^2/2 +9a/4  

Step-by-step explanation

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QuEsTiOn:

(3a-1/2)^3

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Identity to be used :

{(x^3 - y^3) = x^3 - y^3 -3xy(x-y)}

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Using above  identity :

(3a)^3 - (1/2)^3 - 3×3a×1/2(3a - 1/2)

27a^3 - 1/8 - 9a/2 (3a-1/2)

27a^3 - 1/8 - 27a^2/2 +9a/4 - Answer

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