algebra

x^3+216

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asked by Laura
  1. are we factoring ??

    remember ...
    A^3 + B^3 = (A+B)(A^2 - AB + B^2)

    so
    x^3 + 216
    = x^3 + 6^3
    = (x+6)(x^2 - 6x + 36

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    posted by Reiny

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