Jawabanmu

2014-08-27T17:16:19+07:00
1. 3b-4a-5c-(-3a-4c-5b) = 3b-4a-5c+3a+4c+5b = -1a+8b-1c

2. 4a-7c-6b-(5a+6b-3c) = 4a-7c-6b-5a-6b+3c = -1a-12b-4c
Perkalian
1. Xkuadrat+6x-55
1 5 1
2014-08-27T17:17:09+07:00