Jawabanmu

2014-08-26T20:16:48+07:00
[4x(3x-2y)] - [-3x(2x+5y)] = [12x²-8xy] - [-6x²-15xy] = 12x²-8xy+6x²+15xy = 12x²+6x²-8xy+15xy = 18x²+7xy