Write in Expanded from [2x+1]3
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Step-by-step explanation:
(a+b)3 = a3+b3+3ab(a+b)
(2x+1)3 = 8x3 + 1+3×2x×1(2x+1)
8x3+1+6x(2x+1)
8x3+1+12x2+6x
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