(-3xy)²(x²+xy-y²)-3x²y²(3x²+3xy+y²)其中x=-4/3,y=-3/2

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(-3xy)²(x²+xy-y²)-3x²y²(3x²+3xy+y²)其中x=-4/3,y=-3/2(-3xy)²(x&

(-3xy)²(x²+xy-y²)-3x²y²(3x²+3xy+y²)其中x=-4/3,y=-3/2
(-3xy)²(x²+xy-y²)-3x²y²(3x²+3xy+y²)
其中x=-4/3,y=-3/2

(-3xy)²(x²+xy-y²)-3x²y²(3x²+3xy+y²)其中x=-4/3,y=-3/2
=9X^2Y^2(X^2+XY-Y^2)-3X^2Y^2(3X^2+3XY+Y^2)
=3X^2Y^2[(3X^2+3XY-3Y^2)-(3X^2+3XY+Y^2)]
=3X^2Y^2(4Y^2)
=3*4*(4/3)^2*(-3/2)^4
=108