求:分解因式单元的例题及答案
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发布时间:2022-06-06 13:06
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时间:2022-07-11 10:57
(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=____