提公因式、公式法因式分解专题(共6页).doc

精选优质文档-倾情为你奉上因式分解练习一提取公因式法分解因式(1)-15ax-20a; (2)-25x8+125x16; (3)-a3b2+a2b3; (4)6a3-8a2-4a;(5)-x3y3-x2y2-xy; (6)a8+a7-2a6-3a5; (7)6a3x4-8a2x5+16ax6; (8)9a3x2-18a5x2-36a4x4; (9) (10)am-am+1; (11)-12a2n+1bm+2+20am+1b2n+4; (12)x(a+b)+y(a+b);(13)(a+b)2+(a+b); (14)a2b(a-b)+3ab(a-b); (15)x(a+b-3c)-(a+b-3c) (16)a(a-b)+b(b-a);(17)(x-3)3-(x-3)2;