Jawabanmu

Jawaban paling cerdas!
2014-08-28T19:03:58+07:00
A) 13a - 8b + 12a + 9b
=13a + 12a +9b - 8b
=25a +b
B)15i+14b+13k-30i-45j+51k
=15i-30i+14b+13k+51k-45j
=-15i+14b+64k-45j
2 5 2