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18 January, 13:07

Use the binomial theorem to expand (2x+1) ^3

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  1. 18 January, 13:20
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    (2x + 1) ³

    (2x + 1) (2x + 1) (2x + 1)

    (4x² + 2x + 2x + 1) (2x + 1)

    (4x² + 4x + 1) (2x + 1)

    (8x³ + 4x² + 8x² + 4x + 2x + 1)

    8x³ + 12x² + 6x + 1
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