Jawabanmu

2014-08-26T11:03:19+07:00
15+30 (i) + 14 b-45j+(13+51) k=45 i+14b-45j+64 k

2014-08-26T11:04:46+07:00
(15i+14b+13k) + (30i-45j+51k)
=450i² - 630b² + 763k²