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(2a - 3b) 3 (2a - 3b) 3 = (2a) 3 - (3b) 3 - 3(2a)(3b)(2a - 3b) | Using Identity VII = 8a 3 - 27b 3 - 18ab(2a - 3b) = 8a 3 - 27b 3 - 36a 2 b + 54ab 2

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(2a - 3b)³(2a - 3b)³ = (2a)³ - (3b)³ - 3(2a)(3b)(2a - 3b)
| Using Identity VII = 8a³ - 27b³ - 18ab(2a - 3b)
= 8a³ - 27b³ - 36a²b + 54ab²

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