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-   -   Factor completely 125 -27z^3? (https://www.askmehelpdesk.com/showthread.php?t=241902)

  • Jul 26, 2008, 11:34 AM
    aizak23
    factor completely 125 -27z^3?
    I really need help with this problem and I know it is easy but I forgot how to factor completely 125 -27z^3. please help me!!
  • Jul 26, 2008, 11:42 AM
    galactus
    Note the difference of two cubes
  • Jul 26, 2008, 11:47 AM
    aizak23
    Yea I remember now!
    Is this the answer? Jajaja
    Just to be sure!
    (5-3)(25+15w+9w)
  • Jul 26, 2008, 12:04 PM
    galactus
    No, not quite.



    Now use the formula

    Where
  • Jul 26, 2008, 12:09 PM
    aizak23
    Yea!
    I wrote it wrong
    It is (5-3z)(25+15z+9z)
    I couldn't remember that
    But the class is over now
    Thanks!
  • Jan 27, 2011, 08:53 PM
    m4inguyen
    you still got wrong
    it is (5-3z)(25+15z+9Z^2)

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