10道因式分解.快.1.x^2-y^2+2y-12.x^2-10xy+25y^2-6x+30y+83.x(x-4)(x-

題目：

10道因式分解.快.
1.x^2-y^2+2y-1
2.x^2-10xy+25y^2-6x+30y+8
3.x(x-4)(x-2)^2+3
4.(1-x^2)(1-y^2)-4xy
5.b^2+4a-1-4a^2
6.x^2-4xy+4y^2-2x+4y
7.x^2+3ax-10a^2-x+2a
8.(x^2-2x)^2-11(x^2-2x)+24
9.x^2-15xy-100y^2
10.m^4-2m^2+1

解答：

1.（x+y-1)(x-y+1)
2.(x-5y-2)(x-5y-4)
3.(x^2-4x+1)(x+3)(x+1)
4.(1-XY +X +Y)(1-XY-X-Y)
5.(b+2a-1)(b-2a+1)
6.(x-2y-2)(x-2y)
7.（x－2a)(x＋5a－1）
8.(x-3)(x+1)(x-4)(x+2)
9.(x-20y)(x+5y)
10.(m+1)^2(m-1)^2