Jawabanmu

2014-09-04T18:28:42+07:00
(15i + 14b + 13k) + (-30i -45j + 51k) = (15i - 30i) + (13k+51k) + 14b - 45j = -15i + 64k + 14b - 45j
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Jawaban paling cerdas!
2014-09-04T18:32:58+07:00
15i+14b+13k-30i-45j+51k
(15i-30i)+14b+(13k+51k)-45j = -15i+14b+64k-45j 
5 4 5