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16 March, 06:56

simplify (x+3) cubed ... do I expand?

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  1. 16 March, 09:42
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    (x + 3) ^3 = (x + 3) (x + 3) (x + 3) = (x + 3) (x^2 + 6x + 9) = x^3 + 9x^2 + 27x + 27
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