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Math Help - Another simplify question

  1. #1
    ADY
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    Another simplify question

    Here's another please, does this make sense?

    Question: 2(t + 6) - 3(4 - 3t)

    My Answer (Unsure):

    = (t + 12) - (12 - 3t)
    = t x 12 + t - 3t +12-12 + 12-3t
    = 12t + 3t^2 + 0 + 9t
    = 21t - 3t^2

    That right? or miles off?

    Cheers
    Last edited by mr fantastic; January 2nd 2009 at 04:52 AM. Reason: Moved to new thread. Editing to make sense.
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  2. #2
    Bar0n janvdl's Avatar
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    Quote Originally Posted by ADY View Post
    Awesome! Thanks

    Here's another then please, does this make sense?

    Question: 2(t + 6) - 3(4 - 3t)

    My Answer (Unsure):

    = (t + 12) - (12 - 3t)
    = t x 12 + t - 3t +12-12 + 12-3t
    = 12t + 3t^2 + 0 + 9t
    = 21t - 3t^2

    That right? or miles off?

    Cheers
    In future please create a new thread for a new problem.

    2(t+6) - 3(4 - 3t)

    = (2t + 12) - (12 - 9t)

    = 2t + 12 - 12 + 9t

    = 2t + 9t

    = 11t

    =

    EDIT: Well you edited something Mr F, why is there an extra equal sign?
    Last edited by janvdl; January 2nd 2009 at 05:34 AM. Reason: No edit - just flagging the post as having been moved from another thread
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  3. #3
    Member TheMasterMind's Avatar
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    Quote Originally Posted by ADY View Post
    Here's another please, does this make sense?

    Question: 2(t + 6) - 3(4 - 3t)

    My Answer (Unsure):

    = (t + 12) - (12 - 3t)
    = t x 12 + t - 3t +12-12 + 12-3t
    = 12t + 3t^2 + 0 + 9t
    = 21t - 3t^2

    That right? or miles off?

    Cheers
    The distributive law states you must multiply those outside the brackets by those inside

    that being said;

    2(t + 6) - 3(4 - 3t)
    =2*t+2*6-3*4-3*(-3t)
    =2t+12-12+9t
    =2t+9t
    =11t
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