3(x²-2xy)-2(-3xy+y²)化简

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3(x²-2xy)-2(-3xy+y²)化简3(x²-2xy)-2(-3xy+y²)化简3(x²-2xy)-2(-3xy+y²)化简3(x&

3(x²-2xy)-2(-3xy+y²)化简
3(x²-2xy)-2(-3xy+y²)化简

3(x²-2xy)-2(-3xy+y²)化简
3(x²-2xy)-2(-3xy+y²)
=3x²-6xy+6xy-2y²
=3x²-2y²

3(x²-2xy)-2(-3xy+y²)
=3x^2-6x6+6xy-2y^2
=3x^2-2y^2

3x^2-6xy+6xy-2y^2