整式与因式分解练习题及答案
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3.分解因式:
(1) 12abc -2bc 2; (2) 2a 3-12a 2+18a ;
(3) 9a(x -y)+3b(x -y); (4) (x +y )2+2(x +y )+1.
(5)3443ax by ay bx +++ (6)
22244a b ab c +--
(7)16x 2-(x 2+4)2; (8) 3、(1)2bc(6a-c) (2)2a(a-3)2 (3)3(x-y )(3a+b) (4)(x+y+1)2 (5)(3x+4y)(a+b)
(6)(a-2b+c)(a-2b-c) (7)-(x-2)2(x+2)2 (8)(2+21x)(2-21x)
.4412+-
x
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