1) find the Fatrize
a) 4x²y-6x²y³
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Answer:
(-3x²y) × (4x²y - 3xy² + 4x - 5y)
= (-3x²y) × (4x²y) + (-3x²y) × (-3xy²) + (-3x²y) × (4x) + (-3x²y) × (-5y)
= -12x⁴y² + 9x³y³ - 12x³y + 15x²y².
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