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Math Help - expand and simplify

  1. #1
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    expand and simplify

    hi this is my question:

    3x (x - 1) + 2x=?
    would i do this to get the answer:
    3x^2 + 2x + 2x = 3x^2 +4x??
    would this be correct? if not could you please point me in the right direction please,
    Thanks!
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by andyboy179 View Post
    hi this is my question:

    3x (x - 1) + 2x=?
    would i do this to get the answer:
    3x^2 + 2x + 2x = 3x^2 +4x??
    would this be correct? if not could you please point me in the right direction please,
    Thanks!
    Hi andyboy179,

    Distribute your 3x across (x - 1). You did that incorrectly. Then, combine like terms.
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  3. #3
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    oh i think i see my mistake. would i do:
    3x (x - 1) +2x
    3x^2 - 3x + 2x = 3x^2 - x
    Last edited by andyboy179; September 10th 2010 at 08:58 AM. Reason: massive typo!
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  4. #4
    A riddle wrapped in an enigma
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    Quote Originally Posted by andyboy179 View Post
    oh i think i see my mistake. would i do:
    3x (x - 1) +2x
    3x^2 - 3x + 2x = 3x^2 - x
    That would be correct!
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