因式分解练习题及答案,要初二的因式分解题,要计算题,不要填空的,50道,

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/15 00:03:34
因式分解练习题及答案,要初二的因式分解题,要计算题,不要填空的,50道,
x[[+#ES 6iN^' ! F Q$BS]?_ȹuvvgL$TS9uk.<{䓏x]={7{.u |8#џ?}ؗ{r7 Awz.LҞT?sB9Pa5ʳKa;U VE!Apb= uPf0'ƊVF0ِ94WKNn2f0C@آ"Gy!QWFДj,i?y0E HKTUdaIF\}I@Iv?ŕh!!&#UbR>oI$Œ̾AHt¹ jۀETց++#Թ40j 7\Y2 C˲ޓ:* <ڌCsuDK'&]*C[͒! c=aZǫqT1W=}*&5MگӶ:w~άuT7S+N44"K%FSlb[33QBhe `f{{Ez) s*.Ζ7M.]4 3ܔ}`PMbJP:M&Ӡ\i]ͲӮnF#ŻǻV&wͮlu<)IF5Vx1u:vi i\ |LuhHuMQ=0Ho;T9 XKgGǖБwhSeLmm(L.)A¦c,&VuGQŚ}2|%ԘiF1C׼q D /ՓW;2}dV)(oƭu-7J{Vx`a7]r7_-`/]vr~'/YgCV Qow8H>ydݶǭO:ӵQ)?V5y=u΄s0Dr|#]>BJRzli0=5%N#QRYf1׍e#2_ BTlTtb*D\ou'N{bE>P4JP ը!2 #QY0Jo?ZfjLbcΝJrU~P1)䉐sJȼGWHղ̩Ŋ oMBAPNQ*& oRUr WV48LRw!>Mpd & x a}1@!Ь(q:P0BY2i# !SakT(2s#]>l%HIbZZ,g2QZ=J6ѥ(k+X' 򁄺Hl21" hJLL` ~Udz,Ƈ'4mJI]tU8Je՚e#W$yaik--G >TzEUn}L)Ya\@V(ezOPfY )i tjm5I- J:!]l2X/Cxl~ݓYQ (Gy>`>G(H@(  ctT\)>XgFԄB`#B}5vZcLo-i~Q&7W#_NӘ=Icy^ (7h*sqc.(I$?cJ]i ʏ#zi@&j(`4(^\ΝI"7^L¤:ݲu EFɐ\z )s\Z+\negY:ObVqF߄V#  B X30&FhLRN5Ɩ=C rĻ0X+|[z|8~lF=M^C%L;.v#epj(QAgd-w\TmNQWO"Y{5hbì'X# ja_MuUCpR`0L*|+3Mk6ۍ7dnD7Fb{ljl'TIͽQnˢE'T5,1'JXEzDyx_w/a%A MN2d24.:+_5h#ζA_zr[֠\547( *}y5AQJɤ6޼VTBl9d4Hܒ&֛ r/uilu>(DeIC.kz+B4Ei!tNЅO==Mna :[ɪ<6*sx=tOW!8ι(p켊"mŴ"I+lf*lr>`4T+9Cu[@MZjn7,.hWbAL :+JdfKۅ#lTSc#hխAq:69fpsN>bCAskk dE Km?2pMﭸp/%i<s-Ypͧlx"nhrSҡVKVPdآU}Z9=_OfPq: (Ǖ#)&̌nS,h!=|D~7*^U >RLE6eW&ڼM5/O+ܚ^)16O٦xO!Y+Bt+b8 -0H5~IoW7tad·iEǗ3mX(*4=Vh!ԘV,pIx*bS-JkWy"%Ӳ'mb3ZCG,

因式分解练习题及答案,要初二的因式分解题,要计算题,不要填空的,50道,
因式分解练习题及答案,
要初二的因式分解题,要计算题,不要填空的,50道,

因式分解练习题及答案,要初二的因式分解题,要计算题,不要填空的,50道,
因式分解(x+2)(x-3)+(x+2)(x+4)= .
41.因式分解2ax2-3x+2ax-3= .
42.因式分解9x2-66x+121= .
43.因式分解8-2x2= .
44.因式分解x2-x+14 = .
45.因式分解9x2-30x+25= .
46.因式分解-20x2+9x+20= .
47.因式分解12x2-29x+15= .
48.因式分解36x2+39x+9= .
49.因式分解21x2-31x-22= .
50.因式分解9x4-35x2-4= .
51.因式分解(2x+1)(x+1)+(2x+1)(x-3)= .
52.因式分解2ax2-3x+2ax-3= .
53.因式分解x(y+2)-x-y-1= .
54.因式分解(x2-3x)+(x-3)2= .
55.因式分解9x2-66x+121= .
56.因式分解8-2x2= .
57.因式分解x4-1= .
58.因式分解x2+4x-xy-2y+4= .
59.因式分解4x2-12x+5= .
60.因式分解21x2-31x-22= .
61.因式分解4x2+4xy+y2-4x-2y-3= .
62.因式分解9x5-35x3-4x= .
63.因式分解下列各式:
(1)3x2-6x= .
(2)49x2-25= .
(3)6x2-13x+5= .
(4)x2+2-3x= .
(5)12x2-23x-24= .
(6)(x+6)(x-6)-(x-6)= .
(7)3(x+2)(x-5)-(x+2)(x-3)= .
(8)9x2+42x+49= .
(1)(x+2)-2(x+2)2= .
(2)36x2+39x+9= .
(3)2x2+ax-6x-3a= .
(4)22x2-31x-21= .
70.因式分解3ax2-6ax= .
71.因式分解(x+1)x-5x= .
72.因式分解(2x+1)(x-3)-(2x+1)(x-5)=
73.因式分解xy+2x-5y-10=
74.因式分解x2y2-x2-y2-6xy+4=
x3+2x2+2x+1
a2b2-a2-b2+1
(1)3ax2-2x+3ax-2
(x2-3x)+(x-3)2+2x-6
1)(2x+3)(x-2)+(x+1)(2x+3)
9x2-66x+121
17.因式分解
(1)8x2-18 (2)x2-(a-b)x-ab
18.因式分解下列各式
(1)9x4+35x2-4 (2)x2-y2-2yz-z2
(3)a(b2-c2)-c(a2-b2)
19.因式分解(2x+1)(x+1)+(2x+1)(x-3)
20.因式分解39x2-38x+8
21.利用因式分解求(6512 )2-(3412 )2之值
22.因式分解a(b2-c2)-c(a2-b2)
24.因式分解7(x-1)2+4(x-1)(y+2)-20(y+2)2
25.因式分解xy2-2xy-3x-y2-2y-1
26.因式分解4x2-6ax+18a2
27.因式分解20a3bc-9a2b2c-20ab3c
28.因式分解2ax2-5x+2ax-5
29.因式分解4x3+4x2-25x-25
30.因式分解(1-xy)2-(y-x)2
31.因式分解
(1)mx2-m2-x+1 (2)a2-2ab+b2-1
32.因式分解下列各式
(1)5x2-45 (2)81x3-9x (3)x2-y2-5x-5y (4)x2-y2+2yz-z2
33.xy2-2xy-3x-y2-2y-1
34.因式分解y2(x-y)+z2(y-x)
1)因式分解x2+x+y2-y-2xy=
35.因式分解x2-25= .
36.因式分解x2-20x+100= .
37.因式分解x2+4x+3= .
38.因式分解4x2-12x+5= .
39.因式分解下列各式:
(1)3ax2-6ax= .
(2)x(x+2)-x= .
(3)x2-4x-ax+4a= .
(4)25x2-49= .
(5)36x2-60x+25= .
(6)4x2+12x+9= .
(7)x2-9x+18= .
(8)2x2-5x-3= .
(9)12x2-50x+8= .
(1) 答案:a(b−1)(ab+2b+a)
说明:(ab+b)2−(a+b)2 = (ab+b+a+b)(ab+b−a−b) = (ab+2b+a)(ab−a) = a(b−1)(ab+2b+a).
(2) 答案:(x−a)4
说明:(a2−x2)2−4ax(x−a)2
= [(a+x)(a−x)]2−4ax(x−a)2
= (a+x)2(a−x)2−4ax(x−a)2
= (x−a)2[(a+x)2−4ax]
= (x−a)2(a2+2ax+x2−4ax)
= (x−a)2(x−a)2 = (x−a)4.
(3) 答案:7xn−1(x−1)2
说明:原式 = 7xn−1 •x2−7xn−1 •2x+7xn−1 = 7xn−1(x2−2x+1) = 7xn−1(x−1)2.

1 x+5) (x-i)

因式分解2ax2-3x+2ax-3= 。

.因式分解9x2-66x+121= 。
43.因式分解8-2x2= 。
44.因式分解x2-x+14 = 。
45.因式分解9x2-30x+25= 。
46.因式分解-20x2+9x+20= 。
47.因式分解12x2-29x+15= 。
48.因式分解36x2+39x+9= 。
49.因式分解21x2-31x-22= 。
50.因式...

全部展开

.因式分解9x2-66x+121= 。
43.因式分解8-2x2= 。
44.因式分解x2-x+14 = 。
45.因式分解9x2-30x+25= 。
46.因式分解-20x2+9x+20= 。
47.因式分解12x2-29x+15= 。
48.因式分解36x2+39x+9= 。
49.因式分解21x2-31x-22= 。
50.因式分解9x4-35x2-4= 。
51.因式分解(2x+1)(x+1)+(2x+1)(x-3)= 。
52.因式分解2ax2-3x+2ax-3= 。
53.因式分解x(y+2)-x-y-1= 。
54.因式分解(x2-3x)+(x-3)2= 。
55.因式分解9x2-66x+121= 。
56.因式分解8-2x2= 。
57.因式分解x4-1= 。
58.因式分解x2+4x-xy-2y+4= 。
59.因式分解4x2-12x+5= 。
60.因式分解21x2-31x-22= 。
61.因式分解4x2+4xy+y2-4x-2y-3= 。
62.因式分解9x5-35x3-4x= 。

收起

(x+2)(x-3)+(x+2)(x+4)=(x+2)(2x+1)

要得太多了老师留得作业吧 给了你你也不会 给你一个自己举一反三吧 那样你会永远都会的 (2x+5)*(5x+2)= 10X+4x+25x+10大X代表小x 的平方

140.m2(p-q)-p+q
141.(2m+3n)(2m-n)-4n(2m-n).
142.(x+2y)2-x2-2xy.
143.a(ab+bc+ac)-abc.
144.ab-a-b+1.
145.xyz-xy-xz+x-yz+y+z-1.
146.x4-2y4-2x3y+xy3.
148.abc(a2+b2+c2)-a3bc+2ab...

全部展开

140.m2(p-q)-p+q
141.(2m+3n)(2m-n)-4n(2m-n).
142.(x+2y)2-x2-2xy.
143.a(ab+bc+ac)-abc.
144.ab-a-b+1.
145.xyz-xy-xz+x-yz+y+z-1.
146.x4-2y4-2x3y+xy3.
148.abc(a2+b2+c2)-a3bc+2ab2c2.
149.(a-b-c)(a+b-c)-(b-c-a)(b+c-a).
150.a2(b-c)+b2(c-a)+c2(a-b).
a(a+b)(a-b)-a(a+b)2.
152.(x2-2x)2+2x(x-2)+1.
153.2acd-c2a-ad2.
154.(x-y)2+12(y-x)z+36z2.
156.x2-4ax+8ab-4b2.
157.a2b2+c2d2-2abcd+2ab-2cd+1.
158.(ax+by)2+(ay-bx)2+2(ax+by)(ay-bx).
160.(1-a2)(1-b2)-(a2-1)2(b2-1)2.
161.3x4-48y4.
162.(x+1)2-9(x-1)2.
163.(x2+pq)2-(p+q)2x2.
164.(1+2xy)2-(x2+y2)2.
165.4a2b2-(a2+b2)2.
166.4a2b2-(a2+b2-c2)2.
167.(c2-a2-b2)2-4a2b2.
168.(x2-b2+y2-a2)2-4(ab-xy)2.
169.64a4(x+1)2-49b4(x+1)4.
170.ab2-ac2+4ac-4a.
171.4a2-c2+6ab+3bc.
172.x3n+y3n.
174.(x+y)3+125.
176.(m-n)6-(m+n)6.
177.(x+1)6-(x-1)6.
178.a12-b12.
179.(z-x)3-(y+z)3.
180.(3m-2n)3+(3m+2n)3.
181.x6(x2-y2)+y6(y2-x2).
182.8(x+y)3+1.
183.(a-1)3-(b+1)3.
184.(a+b+c)3-a3-b3-c3.
185.x2+4xy+3y2.
186.x2y2-18xy+65.
187.x2+18x-144.
188.x2+30x+144.
189.x4+2x2-8.
190.3x4+6x2-9.
191.-m4+18m2-17.
192.3x4-7x2y2-20y4.
193.x5-2x3-8x.
194.a3-5a2b-300ab2.
195.x8+19x5-216x2.
196.6a4n+k-a2n+k-35ak.
199.30x2+8xy-182y2.
200.m4+14m2-15.
140.(p-q)(m-1)(m+1).
141.(2m-n)2.
142.2y(x+2y).
143.a2(b+c).
144.(b-1)(a-1).
145.(x-1)(y-1)(z-1).
提示:方法一 原式=x(yz-y-z+1)-(yz-y-z+1)
=(yz-y-z+1)(x-1)
=[y(z-1)-(z-1)](x-1)
=(x-1)(y-1)(z-1).
方法二 原式=xy(z-1)-x(z-1)-y(z-1)+(z-1)
=(xy-x-y+1)(z-1)
=[x(y-1)-(y-1)](z-1)
=(x-1)(y-1)(z-1).
146.(x-2y)(x+y)(x2-xy+y2).
提示:方法一 原式=x(x3+y3)-2y(x3+y3)
=(x3+y3)(x-2y)
=(x-2y)(x+y)(x2-xy+y2).
方法二 原式=x3(x-2y)+y3(x-2y)
=(x-2y)(x3+y3)
=(x-2y)(x+y)(x2-xy+y2).
148.abc(b+c)2.
提示:原式=abc(a2+b2+c2-a2+2bc).
149.2(b-c)(a-b-c).
提示:原式=(a-b-c)(a+b-c)+(a-b-c)(b-c-a)
=(a-b-c)[(a+b-c)+(b-c-a)]
=2(b-c)(a-b-c).
150.(a-b)(b-c)(a-c).
提示:原式=a2b-a2c+b2c-ab2+c2(a-b)
=(a2b-ab2)-(a2c-b2c)+c2(a-b)
=ab(a-b)-c(a2-b2)+c2(a-b)
=(a-b)[ab-c(a+b)+c2]
=(a-b)[a(b-c)-c(b-c)]
=(a-b)(b-c)(a-c).
提示:原式=a(a+b)[a-b-(a+b)]=a(a+b)(-2b)
=-2ab(a+b);
152.(x-1)4.
提示:原式=[x(x-2)]2+2•x(x-2)+12
=[x(x-2)+1]2=(x2-2x+1)2
=(x-1)4.
153.-a(c-d)2.
154.(x-y-6z)2.
156.(x-2b)(x-4a+2b).
157.(ab-cd+1)2.
提示:原式=(a2b2-2abcd+c2d2)+2(ab-cd)+1
=(ab-cd)2+2(ab-cd)+1
=(ab-cd+1)2.
158.(ax+by+ay-bx)2.
160.(1+a)(1-a)(1+b)(1-b)(a2+b2-a2b2).
161.3(x2+4y2)(x+2y)(x-2y).
162.4(2x-1)(2-x).
163.(x2+px+qx+pq)(x2-px-qx+pq).
164.(1+x-y)(1-x+y)(x2+y2+2xy+1).
165.-(a+b)2(a-b)2.
166.(a+b+c)(a+b-c)(c+a-b)(c-a+b).
提示:原式=(2ab+a2+b2-c2)(2ab-a2-b2+c2)
=[(a+b)2-c2][c2-(a-b)2]
=(a+b+c)(a+b-c)(c+a-b)(c-a+b).
167.(c+a-b)(c-a+b)(c+a+b)(c-a-b).
168.(x+y+a+b)(x+y-a-b)(x-y+a-b)(x-y-a+b).
提示:原式=(x2-b2+y2-a2+2ab-2xy)(x2-b2+y2-a2-2ab+2xy)
=[(x2-2xy+y2)-(a2-2ab+b2)][(x2+2xy+y2)
-(a2+2ab+b2)]
=[(x-y)2-(a-b)2][(x+y)2-(a+b)2]
=(x-y+a-b)(x-y-a+b)(x+y+a+b)(x+y-a-b).
169.(x+1)2(8a2+7b2x+7b2)(8a2-7b2x-7b2).
170.a(b-c+2)(b+c-2).
提示:原式=a(b2-c2+4c-4)
=a(b2-c2+2b-2b+2c+2c-4)
=a[(b-c)(b+c)-2(b-c)+2(b+c)-4]
=a[(b-c)+2][(b+c)-2].
171.(2a+c)(2a-c+3b).
172.(xn+yn)(x2n-xnyn+y2n).
174.(x+y+5)(x2+2xy+y2-5x-5y+25).
176.-4mn(3n2+m2)(3m2+n2).
提示:原式=[(m-n)3]2-[(m+n)3]2
=[(m-n)3+(m+n)3][(m-n)3-(m+n)3]
=2m[(m-n)2-(m-n)(m+n)(m+n)2]
×{-2n[(m-n)2+(m-n)(m+n)+(m+n)2]}
=-4mn(m2+3n2)(3m2+n2).
177.4x(x2+3)(3x2+1).
提示:原式=[(x+1)3]2-[(x-1)3]2
=[(x+1)3+(x-1)3][(x+1)3-(x-1)3]
=2x[(x+1)2-(x+1)(x-1)+(x-1)2]
×2[(x+1)2+(x+1)(x-1)+(x-1)2]
=4x(x2+3)(3x2+1).
178.(a-b)(a+b)(a2+b2)(a2+ab+b2)(a2-ab+b2)(a4-a2b2+b4).
提示:原式=(a6)2-(b6)2=(a6+b6)(a6-b6)
=[(a2)3+(b2)3][(a3)2-(b3)2]
=(a2+b2)(a4-a2b2+b4)(a3+b3)(a3-b3).
179.-(x+y)(x2+y2+3z2-xy+3yz-3xz).
180.18m(3m2+4n2).
181.(x+y)2(x-y)2(x2-xy+y2)(x2+xy+y2).
提示:原式=(x2-y2)(x6-y6)
=(x+y)(x-y)(x3+y3)(x3-y3).
182.(2x+2y+1)(4x2+8xy+4y2-2x-2y+1).
183.(a-b-2)(a2+ab+b2-a+b+1).
184.3(b+c)(a+b)(c+a).
提示:原式=[(a+b+c)3-a3]-(b3+c3).
185.(x+3y)(x+y).
186.(xy-13)(xy-5).
187.(x-6)(x+24).
188.(x+6)(x+24).
189.(x2-2)(x2+4).
190.3(x2+3)(x+1)(x-1).
191.(m2-17)(1+m)(1-m).
192.(3x2+5y2)(x+2y)(x-2y).
193.x(x+2)(x-2)(x2+2).
194.a(a-20b)(a+15b).
195.x2(x+3)(x2-3x+9)(x-2)(x2+2x+4).
提示:原式=x2(x6+19x3-216)
=x2(x3+27)(x3-8)
=x3(x+3)(x2-3x+9)(x-2)(x2+2x+4).
196.ak(2a2n-5)(3a2n+7).
199.2(3x-7y)(5x+13y).
200.(m2+15)(m+1)(m-1).
201.m2(p-q)-p+q;
202.a(ab+bc+ac)-abc;
203.x4-2y4-2x3y+xy3;
204.abc(a2+b2+c2)-a3bc+2ab2c2;
205.a2(b-c)+b2(c-a)+c2(a-b);
206.(x2-2x)2+2x(x-2)+1;
207.(x-y)2+12(y-x)z+36z2;
208.x2-4ax+8ab-4b2;
209.(ax+by)2+(ay-bx)2+2(ax+by)(ay-bx);
210.(1-a2)(1-b2)-(a2-1)2(b2-1)2;
211.(x+1)2-9(x-1)2;
212.4a2b2-(a2+b2-c2)2;
213.ab2-ac2+4ac-4a;
214.x3n+y3n;
215.(x+y)3+125;
216.(3m-2n)3+(3m+2n)3;
217.x6(x2-y2)+y6(y2-x2);
218.8(x+y)3+1;
219.(a+b+c)3-a3-b3-c3;
220.x2+4xy+3y2;
221.x2+18x-144;
222.x4+2x2-8;
223.-m4+18m2-17;
224.x5-2x3-8x;
225.x8+19x5-216x2;
226.(x2-7x)2+10(x2-7x)-24;
227.5+7(a+1)-6(a+1)2;
228.(x2+x)(x2+x-1)-2;
229.x2+y2-x2y2-4xy-1;
230.(x-1)(x-2)(x-3)(x-4)-48;
231.x2-y2-x-y;
232.ax2-bx2-bx+ax-3a+3b;
233.m4+m2+1;
234.a2-b2+2ac+c2;
235.a3-ab2+a-b;
236.625b4-(a-b)4;
237.x6-y6+3x2y4-3x4y2;
238.x2+4xy+4y2-2x-4y-35;
239.m2-a2+4ab-4b2;
240.5m-5n-m2+2mn-n2.
参考答案:
三、因式分
1.(p-q)(m-1)(m+1).
8.(x-2b)(x-4a+2b).
11.4(2x-1)(2-x).
20.(x+3y)(x+y).
21.(x-6)(x+24).
27.(3+2a)(2-3a).
31.(x+y)(x-y-1).
38.(x+2y-7)(x+2y+5).

收起