Jawabanmu

2014-08-14T20:48:25+07:00
1. 4a kuadrat + 8 - a kuadrat = -a kuadrat + 4a kuadrat + 8

2. x - y +6 -(8x - 4y - 2) = x - y + 6 - 8x + 4y + 2 = -7x  + 3y + 8
2014-08-14T20:51:08+07:00
1. 2a²-a²+8+8 = a²+16
2. (x-y+6) + (4x-4y-2)
    = x+4x-y-4y+6-2
    = 5x-5y+4