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; Jan 2nd 2009 at 03:52 AM. Reason: Moved to new thread. Editing to make sense.
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Originally Posted by ADY 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; Jan 2nd 2009 at 04:34 AM. Reason: No edit - just flagging the post as having been moved from another thread
Originally Posted by ADY 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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