题目

1 x²y-3xy²
2 2x(2x-y)+y(y-2x)
3 -6x(m-2n)+12(2n-m)
4 3(y-x)²-(x-y)³
5 4a²-36
6 (x-2y)²-x²
7 4x³y+4x²y²+xy³
8 (x+y)²-2m(x+y)+m²
9 x²-9x+18
10 -8x²-10x-3

提问时间：2021-03-20

答案

1 x²y-3xy²=xy(x-3y)2 2x(2x-y)+y(y-2x)=(2x-y)(2x-y)=(2x-y)²3 -6x(m-2n)+12(2n-m)=(2n-m)(12+6x)=6(2n-m)(2+x)4 3(y-x)²-(x-y)³=(x-y)²(3-x+y)5 4a²-36=4(a+3)(a-3)6 (x-2y)&#...