Respuesta:
a) 2ab(3a²b+5ab²)
6a³b²+10a²b³
b) -3xy²(2x³y-7x³y)
-6x⁴y³+21x⁴y³
c) -4x²y³z(2x³y⁴-5xy⁴-y³)
-8x5y7+20x³y7+4x²y6z
d) -4x²y³z(3yz-4xy+3)
-12x²y⁴z²+16x³y⁴z-12x²y³z
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Respuesta:
a) 2ab(3a²b+5ab²)
6a³b²+10a²b³
b) -3xy²(2x³y-7x³y)
-6x⁴y³+21x⁴y³
c) -4x²y³z(2x³y⁴-5xy⁴-y³)
-8x5y7+20x³y7+4x²y6z
d) -4x²y³z(3yz-4xy+3)
-12x²y⁴z²+16x³y⁴z-12x²y³z