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(a+2b)³ pls answer me fast I want to write my home work |
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Answer» ong>Step-by-step explanation: (+) (a - 2b)³ = (a)³ - (2b)³ - 3×a×2b (a - 2b) [(a - B)³ = a³ - b³ - 3AB(a - b) = a³ - 8b³ - 6AB (a - 2b) = a³ - 8b³ - 6a²b + 12ab² (-) (a+2b)³ = a³ + 8b³ + 3a (2b) [a+2b] = a³ + 8b³ + 3a³ 2b + 3a 4b² |
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