Jawabanmu

2014-08-11T16:14:22+07:00
(6x²y³ - 15x³y² - 6xy²+ 15x²y -2x²y -4xy²)
= -6xy²-4xy²+15x²y-2x²y+6x²y³-15x³y²
= -2xy²+13x²y+6x²y³-15x³y²