初一因式分解练习题及答案,求!!!~~要速度啊 50题 或者有多少先发多少吧,,,不要出太难了,简单些的

如题所述

第1个回答  2013-05-05
1.因式分解x2-4x-ax+4a=(x-4)(x-a)
2.因式分解25x2-49=(5x-9)(5x+9)
3.因式分解36x2-60x+25=(6x-5)^2
4.因式分解4x2+12x+9=(2x+3)^2
5.因式分解x2-9x+18=(x-3)(x-6)
6.因式分解2x2-5x-3=(x-3)(2x+1)
7.因式分解12x2-50x+8=2(6x-1)(x-4)
8.因式分解ab(x2-y2)+xy(a2-b2)=(ay+bx)(ax-by)
9.因式分解(x+y)(a-b-c)+(x-y)(b+c-a)=2y(a-b-c)
10.因式分解a2-a-b2-b=(a+b)(a-b-1)
11.因式分解(3a-b)2-4(3a-b)(a+3b)+4(a+3b)2=[3a-b-2(a+3b)]^2=(a-7b)^2
12.因式分解(a+3)2-6(a+3)=(a+3)(a-3)
13.因式分解16x2-81=(4x+9)(4x-9)
14.因式分解(2x+1)(x+1)+(2x+1)(x-3)=2(x-1)(2x+1)
15.因式分解2ax2-3x+2ax-3=(x+1)(2ax-3)
16.因式分解x(y+2)-x-y-1=(x-1)(y+1)
17.因式分解(x2-3x)+(x-3)2=(x-3)(2x-3)
18.因式分解9x2-66x+121=(3x-11)^2
19.因式分解8-2x2=2(2-x)(2+x)
20.因式分解x4-1=(x-1)(x+1)(x^2+1)
21.因式分解x2+4x-xy-2y+4=(x+2)(x-y+2)
22.因式分解4x2-12x+5=(2x-1)(2x-5)
23.因式分解21x2-31x-22=(21x+11)(x-2)
24.因式分解4x2+4xy+y2-4x-2y-3=(2x+y-3)(2x+y+1)
25.因式分解9x5-35x3-4x=x(9x^2+1)(x+2)(x-2)35.因式分解x2-25=(x+5)(x-5)
26.因式分解(2a-b)²+8ab=(2a+b)²
27.因式分解y²-2y-x²+1=(y-1)²-x²=(y-1-x)(y-1+x)
28.因式分解x²-xy+yz-xz =x(x-y)-z(x-y)=(x-z)(x-y)
29.因式分解6x²+5x-4 =(2x-1)(3x+4)
30.因式分解2a²-7ab+6b²=(2a-3b)(a-2b)
31.因式分解(x²-2x)²+2(x²-2x)+1 =(x²-2x+1)²=(x-1)^4
32.因式分解(x²-2x)²-14(x²-2x)-15 =(x²-2x-15)(x²-2x+1)=(x+3)(x-5)(x-1)²
33.因式分解x²(x-y)+(y-x) =(x²-1)(x-y)=(x+1)(x-1)(x-y)
34.因式分解169(a+b)²-121(a-b)²=(14a+14b-11a+11b)(14a+14b+11a-11b)=(3a+25b)(25a+3b)
35.因式分解(x-3)(x-5)+1 =(x-3)²-2(x-3)+1 =(x-3-1)²=(x-4)²
36.因式分解x2-20x+100=(x-10)^2

37.因式分解x2+4x+3=(x+1)(x+3)
38.因式分解4x2-12x+5=(2x-1)(2x-5)
39.因式分解3ax2-6ax=3ax(x-2)
40.因式分解(x+2)(x-3)+(x+2)(x+4)=(x+2)(2x-1)
41.因式分解2ax2-3x+2ax-3= (x+1)(2ax-3)
42.因式分解9x2-66x+121=(3x-11)^2
43.因式分解8-2x2=2(2+x)(2-x)
44.因式分解x(x+2)-x=x(x+1)
45.因式分解9x2-30x+25=(3x-5)^2
46.因式分解-20x2+9x+20=(-4x+5)(5x+4)
47.因式分解12x2-29x+15=(4x-3)(3x-5)
48.因式分解36x2+39x+9=3(3x+1)(4x+3)
49.因式分解21x2-31x-22=(21x+11)(x-2)
50.因式分解9x4-35x2-4=(9x^2+1)(x+2)(x-2)
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