18x²(x-2y)²-24xy(2y-x)²-6x(2y-x)².其中x=-3,y=-118x²(x-2y)²-24xy(2y-x)²-6x(2y-x)³.其中x=-3,y=-1
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![18x²(x-2y)²-24xy(2y-x)²-6x(2y-x)².其中x=-3,y=-118x²(x-2y)²-24xy(2y-x)²-6x(2y-x)³.其中x=-3,y=-1](/uploads/image/z/1002175-7-5.jpg?t=18x%26sup2%3B%EF%BC%88x-2y%EF%BC%89%26sup2%3B-24xy%282y-x%29%26sup2%3B-6x%282y-x%29%26sup2%3B.%E5%85%B6%E4%B8%ADx%3D-3%2Cy%3D-118x%26sup2%3B%EF%BC%88x-2y%EF%BC%89%26sup2%3B-24xy%282y-x%29%26sup2%3B-6x%282y-x%29%26sup3%3B.%E5%85%B6%E4%B8%ADx%3D-3%EF%BC%8Cy%3D-1)
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18x²(x-2y)²-24xy(2y-x)²-6x(2y-x)².其中x=-3,y=-118x²(x-2y)²-24xy(2y-x)²-6x(2y-x)³.其中x=-3,y=-1
18x²(x-2y)²-24xy(2y-x)²-6x(2y-x)².其中x=-3,y=-1
18x²(x-2y)²-24xy(2y-x)²-6x(2y-x)³.其中x=-3,y=-1
18x²(x-2y)²-24xy(2y-x)²-6x(2y-x)².其中x=-3,y=-118x²(x-2y)²-24xy(2y-x)²-6x(2y-x)³.其中x=-3,y=-1
18x²(x-2y)²-24xy(2y-x)²-6x(2y-x)³
=6x(x-2y)²(3x-4y+x-2y)
=6x(x-2y)²(4x-6y)
=12x(x-2y)²(2x-3y)
当x=-3,y=-1
原式=12*(-3)²(-3)
=-324