Jawabanmu

2014-08-05T19:38:16+07:00
= (15i + 14j + 13k) + ( -30i - 45j + 51k)
= (15i + 14j + 13k -30i -45j + 51k)
= -51i-31j+64k
2014-08-05T19:39:47+07:00
Jawabannya adalah 
-15i - 31j + 64k
2 2 2