1.
25(x^4-x^5)=25x^4(1-x)
2.
-2( x^2n+2x^n)=-2x^n(x^n+2)
3.看不懂是X还是乘号
4.
-(m+n)(m-n)(n+1)
5.
(a-b)(x-y)(x-2y-a-b)
6.
-(x-2y+3z)(a+b)
7.
(5x+3)(5x+6-5x-7)=-(5x+3)
8.
(x-y)(a-2)^n
1.
25(x^4-x^5)=25x^4(1-x)
2.
-2( x^2n+2x^n)=-2x^n(x^n+2)
3.看不懂是X还是乘号
4.
-(m+n)(m-n)(n+1)
5.
(a-b)(x-y)(x-2y-a-b)
6.
-(x-2y+3z)(a+b)
7.
(5x+3)(5x+6-5x-7)=-(5x+3)
8.
(x-y)(a-2)^n