what is (2x+1)³ with the identity/ formula (a+b)³
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a3+b3+3a2b+3ab2 formula of cube
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(2x)³+(1)³+3×(2x)×(1)×(2x+1)
8x³+1+6×(2x+1)
8x³+1+12x+6
8x³+12x+7
8x³+1+6×(2x+1)
8x³+1+12x+6
8x³+12x+7
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