海贼之最强抽奖系统txt:谁能给些因式分解练习题
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好的话有追加分
(一)填空
1.一个多项式若能因式分解,则这个多项式被其任一因式除所得余式为_________.
2.变形(1)(a+b)(a-b)=a2-b2,(2)a2-b2=(a-b)(a+b)中,属于因式分解过程的是________.
3.若a,b,c三数中有两数相等,则
a2(b-c)+b2(c-a)+c2(a-b)的值为_________.
4.12.718×0.125-0.125×4.718=_________.
5.1.13×2.5+2.25×2.5+0.62×2.5=_________.
6.分解因式:a2(b2-c2)-c2(b-c)(a+b)=_________.
7.因式分解:(a-2b)(3a+4b)+(2a-4b)(2a-3b)=(a-2b)·( ).
8.若a+b+c=m,则整式m·[(a-b)2+(b-c)2+(c-a)2]+6(a+b+c)(ab+bc+ca)可用m表示为_______________.
9.(2x+1)y2+(2x+1)2y=_________.
10.因式分解:(x-y)n-(x-y)n-2=(x-y)n-2·_________.
11.m(a-m)(a-n)-n(m-a)(a-n)=_________.
12.因式分解:x(m-n)+(n-m)y-z(m-n)=(m-n)( ).
13.因式分解:
(x+2y)(3x2-4y2)-(x+2y)2(x-2y)=________.
14.21a3b-35a2b3=_________.
15.3x2yz+15xz2-9xy2z=__________.
16.x2-2xy-35y2=(x-7y)( ).
17.2x2-7x-15=(x-5)( ).
18.20x2-43xy+14y2=(4x-7y)( ).
19.18x2-19x+5=( )(2x-1).
20.6x2-13x+6=( )( ).
21.5x2+4xy-28y2=( )( ).
22.-35m2n2+11mn+6=-( )( ).
23.6+11a-35a2=( )( ).
24.6-11a-35a2=( )( ).
25.-1+y+20y2=( )( ).
26.20x2+( )+14y2=(4x-7y)(5x-2y).
27.x2-3xy-( )=(x-7y)(x+4y).
28.x2+( )-28y2=(x+7y)(x-4y).
29.x2+( )-21y2=(x-7y)(x+3y).
30.kx2+5x-6=(3x-2)( ),k=______.
31.6x2+5x-k=(3x-2)( ),k=______.
32.6x2+kx-6=(3x-2)( ),k=______.
33.18x2-19x+5=(9x+m)(2x+n),则m=_____,n=_____.
34.18x2+19x+m=(9x+5)(2x+n),则m=_____,n=_____.
35.20x2-43xy+14y2=(4x+m)(5x+n),则m=_____,n=_____.
36.20x2-43xy+m=(4x-7y)(5x+n),则m=_____,n=_____.
38.x4-4x3+4x2-1=_______.
39.2x2-3x-6xy+9y=________.
40.21a2x-9ax2+6xy2-14ay2=________.
41.a3+a2b+a2c+abc=________.
42.2(a2-3ac)+a(4b-3c)=_________.
43.27x3+54x2y+36xy2+8y3_______.
44.1-3(x-y)+3(x-y)2-(x-y)3=_______.
45.(x+y)2+(x+m)2-(m+n)2-(y+n)2=_______.
46.25x2-4a2+12ab-9b2=_______.
47.a2-c2+2ab+b2-d2-2cd=_______.
48.x4+2x2+1-x2-2ax-a2=________.
50.a2-4b2-4c2-8bc=__________.
51.a2+b2+4a-4b-2ab+4=________.
答案一)填空
1.0
2.(2)
3.0
4.1
5.10
6.(a-c)(b-c)(ab+bc+ca)
7.7a-2b
8.2m3
9.(2x+1)y(y+2x+1)
10.(x-y+1)(x-y-1)
11.(a-m)(a-n)(m+n)
12.x-y-z
13.2x2(x+2y)
14.7a2b(3a-5b2)
15.3xz(xy+5z-3y2)
16.x+5y
17.2x+3
18.5x-2y
19.9x-5
20.(3x-2)(2x-3)
21.(5x+14y)(x-2y)
22.(5mn-3)(7mn+2)
23.(3-5a)(2+7a)
24.(3+5a)(2-7a)
25.(4y+1)(5y-1)
26.-43xy
27.28y2
28.3xy
29.-4xy
30.2x+3,k=6
31.2x+3,k=6
32.2x+3,k=5
33.m=-5,n=-1
34.m=5,n=1
35.m=-7y,n=-2y
36.m=14y2,n=-2y
38.(x-1)2(x2-2x-1)
39.(2x-3)(x-3y)
40.(3x-7a)(2y2-3ax)
41.a(a+b)(a+c)
42.(2a-3c)(a+2b)
43.(3x+2y)3
44.3(1-x+y)
45.2(x-n)(x+y+m+n)
46.(5x+2a-3b)(5x-2a+3b)
47.(a+b+c+d)(a+b-c-d)
48.(x2+x+a+1)(x2-x-a+1)
50.(a+2b+2c)(a-2b-2c)
51.(a-b+2)2
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