ejercicios de factor comun

1.-48x2-12x3-24x4=
2.-25b2+35b4-45b5=
3.-11ax-121a2x+33a2=
4.-9a5b-12a2b3+15ab2-18a3b4 =
5.-9x2+6x+3 =
6.-4x4-8x3+12x2 =
7.-6x2-6xy-6 =
8.-14x2y2-28x3+56x4 =
9.-34ax2+51a2y-68ay2 =
10.-55m2n3x+110m2n3x2-220m2y3 =
11.-25x7-10x5+15x3-5x2 =
12.-9a2-12ab+15a3b2-24ab3 =
13.-3a3b+6a3b2-5a4b3+8a5b4+4a6b5 =
14.-16x3y2-8x4y-24x2y-40x2y3 =
15.-18x5-30x4 =