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=[(2x-3y)+(3x-2y)][(2x-3y)²-(2x-3y)(3x-2y)+(3x-2y)²]-125(x-y)³
=5(x-y)[13x²+13y²-24xy-6x²-6y²+13xy]-25×5(x-y)(x-y)²
=5(x-y)(7x²+7y²-11xy)-25×5(x-y)(x²-2xy+y²)
=5(x-y)[(7x²+7y²-11xy)-25(x²+y²-2xy)]
=5(x-y)(-18x²-18y²+39xy)
= - 15(x-y)(6x²+6y²-13xy)= -15(x-y)(2x-3y)(3x-2y)
=5(x-y)[13x²+13y²-24xy-6x²-6y²+13xy]-25×5(x-y)(x-y)²
=5(x-y)(7x²+7y²-11xy)-25×5(x-y)(x²-2xy+y²)
=5(x-y)[(7x²+7y²-11xy)-25(x²+y²-2xy)]
=5(x-y)(-18x²-18y²+39xy)
= - 15(x-y)(6x²+6y²-13xy)= -15(x-y)(2x-3y)(3x-2y)
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就这么多？
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