1,b(a-b)²-(a-b)³2,a²(x-y)²+2a(x-y)³3,(x-2)²-y(2-x)²4,5(x-y)³+10(y-x)²5,10a(x-y)³-5b(y-x)²

1,b(a-b)²-(a-b)³2,a²(x-y)²+2a(x-y)³3,(x-2)²-y(2-x)²4,5(x-y)³+10(y-x)²5,10a(x-y)³-5b(y-x)²
1,b(a-b)²-(a-b)³
2,a²(x-y)²+2a(x-y)³
3,(x-2)²-y(2-x)²
4,5(x-y)³+10(y-x)²
5,10a(x-y)³-5b(y-x)²

1,b(a-b)²-(a-b)³2,a²(x-y)²+2a(x-y)³3,(x-2)²-y(2-x)²4,5(x-y)³+10(y-x)²5,10a(x-y)³-5b(y-x)²
1,b(a-b)²-(a-b)³=（a-b）²(2b-a)
2,a²(x-y)²+2a(x-y)³=(x-y)²(a^2+2ax-2ay)
3,(x-2)²-y(2-x)²=(x-2)²(1-y)
4,5(x-y)³+10(y-x)²=5(x-y)^2(x-y-2)
5,10a(x-y)³-5b(y-x)²=5(x-y)^2(ax-12ay-b)
肯定对

1，b(a-b)²-(a-b)³
=(a-b)²[b-(a-b)]
=(a-b)²(2b-a)
2，a²(x-y)²+2a(x-y)³
=a(x-y)²[a+2(x-y)]
=a(x-y)²(a+2x-2y)
3，(x-2)²-y(2-x)²...

全部展开

1，b(a-b)²-(a-b)³
=(a-b)²[b-(a-b)]
=(a-b)²(2b-a)
2，a²(x-y)²+2a(x-y)³
=a(x-y)²[a+2(x-y)]
=a(x-y)²(a+2x-2y)
3，(x-2)²-y(2-x)²
=(x-2)²-y(x-2)²
=(x-2)²(1-y)
4，5(x-y)³+10(y-x)²
=5(x-y)³+10(x-y)²
=5(x-y)²(x-y+2)
5，10a(x-y)³-5b(y-x)²
=10a(x-y)³-5b(x-y)²
=5(x-y)²[2a(x-y)-b]
=5(x-y)²(2ax-2ay-b)

收起

1、（2b-a）（a-b）²
2、a（x-y）²（a+2x-2y）
3、（x-2）²（1-y）
4、5（x-y）²（x-y+2）
5、5（x-y）²（2ax-2ay-b）

1，
b(a-b)²-(a-b)³
=(a-b)²(b-a+b)
=(a-b)²(2b-a)
2，
a²(x-y)²+2a(x-y)³
=a(a+2x-2y)(x-y)²
3，
(x-2)²-y(2-x)²
=(x-2)...

全部展开

1，
b(a-b)²-(a-b)³
=(a-b)²(b-a+b)
=(a-b)²(2b-a)
2，
a²(x-y)²+2a(x-y)³
=a(a+2x-2y)(x-y)²
3，
(x-2)²-y(2-x)²
=(x-2)²-y(x-2)²
=(x-2)²(1-y)
4，
5(x-y)³+10(y-x)²
=5(x-y)²(x-y+2)
5，
10a(x-y)³-5b(y-x)²
=5(x-y)²(2ax-2ay-b)

收起