Penjelasan dengan langkah-langkah:
a) 15a²b²-7ac²+3bx-2ac²+5a²b²-2bx
= 15a²b²+5a²b²-7ac²-2ac²+3bx-2bx
= 20a²b²-9ac²+bx
b) 12(2x³y+4x²y²)
= 24x³y+48x²y²
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Penjelasan dengan langkah-langkah:
a) 15a²b²-7ac²+3bx-2ac²+5a²b²-2bx
= 15a²b²+5a²b²-7ac²-2ac²+3bx-2bx
= 20a²b²-9ac²+bx
b) 12(2x³y+4x²y²)
= 24x³y+48x²y²