4x^2y^3(2x^2-3xy+5y^2)÷(-4x^2y^2)=[(4x²y³)÷(-4x²y²)](2x²-3xy+5y²)=-y(2x²-3xy+5y²)=-2x²y+3xy²-5y³不懂的欢迎追问.
4x^2y^3(2x^2-3xy+5y^2)÷(-4x^2y^2)怎么做
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