can someone tell me how to factor this, i forgot?

Discussion in 'Community Discussion' started by macman2790, Feb 4, 2007.

  1. macman2790 macrumors 6502a

    macman2790

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    Sep 4, 2006
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    Texas
    #1
    x^3 + 125, yeah i know its probably easy, but i kinda forgot, somehow.
     
  2. dukebound85 macrumors P6

    dukebound85

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    #2
    (x+5)*(x^2-5x+25)
     
  3. Bobdude161 macrumors 65816

    Bobdude161

    Joined:
    Mar 12, 2006
    Location:
    N'Albany, Indiana
    #3
    man if i posted math questions i didn't know they would've created a bobdude161 discussion board by now.
     
  4. dukebound85 macrumors P6

    dukebound85

    Joined:
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    Location:
    5045 feet above sea level
    #4
    haha what? im totally confused
     
  5. macman2790 thread starter macrumors 6502a

    macman2790

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    Sep 4, 2006
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    Texas
  6. siurpeeman macrumors 603

    siurpeeman

    Joined:
    Dec 2, 2006
    Location:
    the OC
    #6
    further, any a^3 - b^3 will give you (a - b)(a^2 + ab + b^2)
    and a^3 + b^3 will be (a + b)(a^2 - ab + b^2). just remember that the signs change.
     

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