Jawabanmu

2014-09-09T18:16:41+07:00
4x + 10y - 9x + 12xy = 4x - 9x + 10y + 12xy = -5x + 10y +12xy
2 5 2
2014-09-09T18:17:01+07:00
4x + 10y - 9x + 12xy
= 4x - 9x + 10y +12xy
= -5x + 10y + 12xy