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26 August, 22:01

Simplifying (3+x) cubed

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  1. 26 August, 22:05
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    Hello

    by identité : (a+b) 3 = a3 + b3 + 3a²b + 3b²a

    (3+x) 3 = 27 + x3 + 27x + 9 x²

    or : (3+x) 3 = (3+x) (3+x) ² ...
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