(-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](/uploads/image/z/401924-20-4.jpg?t=%28-3xy%29%26%23178%3B%28x%26%23178%3B%2Bxy-y%26%23178%3B%29-3x%26%23178%3By%26%23178%3B%283x%26%23178%3B%2B3xy%2By%26%23178%3B%29%E5%85%B6%E4%B8%ADx%3D-4%2F3%2Cy%3D-3%2F2)
(-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