math

factor completely

81x^4 - 81

possible choices are::

(9x^2 + 9)(9x^2 - 9)

OR

(9x^2 +9)(3x + 3)(3x - 3)

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asked by Skye
  1. No reason to stop there. Factor out all those 3's:

    81(x^2+1)(x-1)(x+1)

    If you must pick one of those choices, then use the last one, since it factors the 9x^2-9 as well. (factor completely!)

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    posted by Steve
  2. 0968763228

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    posted by seng

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