1.(x-9)(x+2)
2.(a+4b)(a+8b)
3.(a^2-4)(a^2+1)
4.(x^2-4)(x^2-9)
5.(a+2b-16)(a+2b+1)
6.(ab-20c)(ab-3c)
7.a(a-8b)(a+3b)
8.题目是不是写错了,应该是3ab^2-……吧
答案是3ab^2(2a-1)(a-1)
9.(x+1)(x-3)(x-1)^2
10.(x+1)(x-3)(x^2+x-3)
1.(x-9)(x+2)
2.(a+4b)(a+8b)
3.(a^2-4)(a^2+1)
4.(x^2-4)(x^2-9)
5.(a+2b-16)(a+2b+1)
6.(ab-20c)(ab-3c)
7.a(a-8b)(a+3b)
8.题目是不是写错了,应该是3ab^2-……吧
答案是3ab^2(2a-1)(a-1)
9.(x+1)(x-3)(x-1)^2
10.(x+1)(x-3)(x^2+x-3)