(6x²y-24x³y³)/(-3x²)+(2y)²*(-2xy)
=6x²(y-4xy³)/(-3x²)-8xy³
=-2(y-4xy³)-8xy³
=-2y+8xy³-8xy³
= -2y�һ���2�����⣬1.���㷽�̣�x+4)^2-(x+4)(x-4)=4�Ľ��ǣ�2.-6a^2b^3c/2ab^3�����ش����Ҿ͸��ˣ�лл��(1)（x+4)²-(x+4)(x-4)=4 x²+8x+16-(x²-16)=4 8x+32=4 8x=-28x= -7/2(2)-6a²b³c/2ab³= -3ac