初一数学因式分解专项训练
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中 【.占八 存R IZp—P-
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一：用十子相乘法分解因式
2 2
(1) t -15t+36    ( 2) x -7x+6
(3) a2-a-12
(4)m 2-8m-20


2
(5) x-2x-3
2
(6) x -7x+6
2
(7) x-10x+24
2
(8) a +4a-21
(9) p2-10p-11
(10)x2-3x-28
(11)b2+11b+28
(12)2x2-6x-8
2
(13) 2x +15x+7
2 2
(14)3a -8ab+4b
(15) 4x2y2-5xy2-9y2
2 2
(16) 4m +8mn+3n
2    2
(17) 6x-iixy+3y
(18) a4-13a2+36
(19)2x2-6x-8
(2 0)6x2-13x+6
(21) 2x2+3x+1
2
(22) (x+y) -5(x+y)-14
2
(23) ap -8ap+7a
3    2
(24) -a -4a 12a
2
(25) 4x -12x 9
2
(26) 4a -35a -9
2
(27) 5(x-y) 14(x-y) 8


:利用分组分解分解因式
(1) 3a-ax-3b+bx
⑵ 3ax+4by+4ay+3bx
2
(3) xy-y -yz+xz
(4初一数学练习题) 20(x+y)+x+y
(5)p-q+k(p-q)
(6)ac+bc+2a+2b
2
(7)a +ab-ac-bc
2 2
(8)x -y +ax+ay
2 2
(9)4a -b +6a-3b
2 2
(10) m -n +am+an
(11) xy-xz+y-z
2 2
(12) 4m -4m+2n-n
2 2
(13) 9y +6y-4x-4x
2 2
(14) x -6x+9-y
2 2
(15) 16a +8a-b +1
/ 、 2 2
(16) x -a -2x-2a
2 2
(17)4x -y +2x-y
2 2 2 2
(18) xy-y +1-x
2 2 2
(19)4x -4xy+y -a
2 2 2
(20)x -2xy-m +y
2 2
(21)1-a +2ab-b
2 2 2
(22) x +2xy+y -a
(23) 4xy-3xz+8y-6z
2 2
(24) x -4y +x-2y
2 2 2
(25)x -y -z +2yz
2 2
(26) 1-m -n +2mn
2 2 2 2
(27) a — 2ab+b — m — 2mn — n