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Math Help - can i add these?

  1. #1
    Newbie
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    Oct 2006
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    21

    can i add these?

    this part of a big problem
    do i distribute the 3 first or do i distribute the 4 first?


    -3(n-3).4
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  2. #2
    MHF Contributor
    Joined
    Apr 2005
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    1,631
    Quote Originally Posted by elfen_lied View Post
    this part of a big problem
    do i distribute the 3 first or do i distribute the 4 first?


    -3(n-3).4
    -3(n -3).4

    If that is
    -3(n -3)(4),
    then it does not matter whether you multiply by the -3 first or by the 4 first.

    If by the -3 first:
    -3(n -3)(4)
    = (-3n +9)(4)
    = -12n +36 -------------answer.

    If by the 4 first:
    -3(n -3)(4)
    = -3(4n -12)
    = -12n +36 ----------same as above.
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