1) 3x³y + 6x² + 3xy³ = 3x(x²y + 2x + y³)
2) x²(3 + 2x) - x(2x + 3)² = x(3 + 2x)(x - 2x - 3) = - x(3 + 2x)(x + 3)
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1) 3x³y + 6x² + 3xy³ = 3x(x²y + 2x + y³)
2) x²(3 + 2x) - x(2x + 3)² = x(3 + 2x)(x - 2x - 3) = - x(3 + 2x)(x + 3)
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