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March 30, 2017

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I was wondering what the answer to this is.

(x-7)3 3 means it is cubed


i workedit out but i was wondering what it might be.

  • algebra - ,

    (x-7)^3
    = (x-7)(x-7)(x-7)
    = (x-7)(x^2 - 14x + 49)
    = x^3 - 14x^2 + 49x - 7x^2 + 98x - 343
    = x^3 - 21x^2 + 147x - 343

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