please help me with this find the cube of 2a-1
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Answer:
(2a − 1)3 = (2a)3 − (1)3 − 3×2a×1(2a − 1)
= 8a3 − 1 − 6a (2a − 1)
= 8a3 − 1 − 12a2 + 6a
= 8a3 − 12a2 + 6a − 1
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