2.(x- 1)2-2(x- 1)+ 1
Solution: The original formula =(x- 1- 1)2.
=(x-2)2。
3.8x2- 10x+2
Solution: Original formula =2(4x2-5x+ 1)
=2(4x- 1)(x- 1)
=(4x- 1)(2x-2)
4.2a2-4a
Solution: Original formula =2a(a-2)
5.4x2-4x+ 1=(2x- 1)2
6.a4b-6a3b+9a2b
Solution: Original formula =a2b(a2-6a+9)
=a2b(a-3)2
7.x(x-y)-y(x-y)=(x-y)2
8.x2y-4y
Solution: Original formula =y(x2-4)
=y(x2-22)
=y(x+2)(x-2)
9.2x2-4x+2
Solution: Original formula =2(x2-2x+ 1)
=2(x- 1)2
10.m2- 16=(m-4)(m+4)
1 1.m2+4m=m(m+4)
12.m2-8m+ 16=(m-4)2
13 . a2-2a+ 1 =(a- 1)2
14 . x2+2x+ 1 =(x+ 1)2
15.x2-y2-2y- 1
Solution: The original formula =x2-(y2+2y+ 1),
=x2-(y+ 1)2,
=(x+y+ 1)(x-y- 1)
16.(6x2-3x)-2(7x-5),
Solution: The original formula =6x2-3x- 14x+ 10.
=(6x-5)(x-2)
17.a3-4ab2
Solution: Original formula =a(a2-4b2)
=a(a+2b)(a-2b)
18.x3-2x2+x
Solution: Original formula =x(x2-2x+ 1)
=x(x- 1)2
19.x2-6x+9=(x-3)2
20.mx2-6mx+9m,
Solution: The original formula =m(x2-6x+9),
=m(x-3)2
Sorry, I've been playing for about 20 minutes. I'm so tired. You can go to Jingyu. Com and search. There is a lot of analysis in it.