Jawabanmu

2014-09-10T14:12:11+07:00
2014-09-10T14:15:11+07:00
A. (9p pangkat2 + 3) + (3p pangkat2 - 7)
= 9p pngkt2 + 3 + 3p pngkt2 - 7
= 12p pngkt2 - 4

b. (4 + 6a pngkt2 - 5ab) + (-2ab + a pngkt2 - 3)
= 1 + 7a pngkt2 - 7ab