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1.??????????
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2.??????3?
?13???25???? ? A. ?1 B. 1 C. 0 D. 1997
3.??5a?3b?2??5a?3b?2?A??A=??A. 30ab B. 60ab C. 15ab D. 12ab
4.??x?y??5,xy?3,?x2?y2??? A. 25.B ?25C19 D??19
5.??xa?3,xb?5,?x3a?2b??? A?27
25B?9
10C?3
5 D?52
6. .??????????????????
?????????????? b a
?(2a+b)(m+n); ?2a(m+n)+b(m+n); m
?m(2a+b)+n(2a+b);?2am+2an+bm+bn? n
?????????? ?A??? B???C????D?????
7??(x+m)?(x+3)??????x??????m???? ?
A? 3 B?3 C?0D?1
8???.(a+b)2=9?ab= ?112??a2+b2??????
A?84B?78 C?12 D?6
9????a?b??a+b??a2+b2??a4?b4???????
A?a8+2a4b4+b8 B?a8?2a4b4+b8 C?a8+b8 D?a8?b8
10.??P?7
15m?1,Q?m2?8
15m?m????????P?Q????????
A?P?QB?P?QC?P?QD?????
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11.?4x2?mx?121??????????m=_______?
12.??x?1
x?5???x2?1
x2=_______?
13.???x?3??2x?5???2x?1??x?8??41???_______?
14.??m?n?2?mn??2??(1?m)(1?n)?_______?
15.??2a=5,2b=10,2c=50,??a?b?c??????????___________.
16.?m2?n2?6??m?n?3??m?n??
???????8???66??17??????9??
?1???1?
?3?6m2n?
6m2n2?3m2??3m2 ?4?
18????9???1??????????2a?b???a?1?b??a?1?b???a?1????a?22201223?1?0??????3.14????2?2x3y???2xy???2x3y?2x2 ?2??2?????????? 1?b??
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19????8??????,???ABCD?????????????AB=2a?BC=3b??E
1?AB?????CF=3 BC?????????????????????????
20????8???(x2+mx-8) (x2-3x+n)???????x2?x3?,?m?n??
21????8???a=2005?b =2006?c=2007??a2?b2?c2?ab?bc?ac???
22????8??.??????(x?y)2?(x?y)(x?y)??(?2y)?y????y?????
23????8?????????????3a+b??????2a+b????????????????????????????????????????????????????a=3?b=2???????
24????8?????????????????????????????????????????????m?????a???????????2m?????????????x???????????
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1?????????? ??
A?2x23x3=6x3 B?2x2+3x3=5x5 C???3x2???3x2?=9x5D?5n2m1mnxx=x 452
2????????3y2?2y?5?????5y3?4y?6?????????? ??
A?5y3+3y2+2y?1 B?5y3?3y2?2y?6
C?5y3+3y2?2y?1D?5y3?3y2?2y?1
3?????????? ??
A?a2a3=a5 B??a2?3=a5 C?a6a2=a3 D?a6?a2=a4
4??????????? ??
A?1a+1a=1a B?3a2+2a3=5a5
235 C?3x2y+4yx2=7 D??mn+mn=0
5??????????? ??
A??1
3xy2???? B?xy2???? C?x?1???? D?0?????
6???x?2y?2=?x+2y?2+m??m??? ??A?4xy B??4xyC?8xy D??8xy
7??a?b+c???a+b?c???? ??
A???a?b+c?2 B?c2??a?b?2 C??a?b?2?c2 D?c2?a+b2
8????3x2y???4
3x4y?????? ??
A?x6y2B??4x6y C??4x6y2 D?x8y
9????x+4?0=1??????? ??
A?x???? B?x?0 C?x?4 D?x??4
10????????????????????????? ??
A??m?n??n?m? B??a+b???a?b?
C???a?b??a?b? D??a+b??a+b?
11??????????? ??
A??m+n?2=m2+n2B??2a?b?2=4a2?2ab+b2
C??4x+1?2=16x2+8x+1 D??x?3?2=x2?9
12??A=?2+1??22+1??24+1??28+1???A?2003??????? ??
A?0 B?2C?4 D?6
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13??xy2????______????_______?
14????????a???????7????????????????______?
15?x_______=xn+1??m+n??______?=n2?m2??a2?3?a3?2=______?
16?????????3.84105??????????8102??/??????????
?????_________?
17?a2+b2+________=?a+b?2 a2+b2+_______=?a?b?2? ?a?b?2+______=?a+b?2
18??x2?3x+a????????a=_______?
19????5x2?7x?3?____?_______???
20??????????0.000000059=________?
21???3xmy5?0.4x3y2n+1??????m+n=______?
22????2a+2b+1??2a+2b?1?=63???a+b???________?
23??x2+kx+1
4=?x?1
2?2??k=_______??x2?kx+1????????k=______?
24???16
15??2=______??x??2=_______?
25?22005?0.125?668=________?
26????????????????x???????_______?
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27??2x2y?3xy2???6x2y?3xy2?28???3
2ax4y3???6
5ax2y2?8a2y
29??45a3?1
6a2b+3a???1
3a? 30??21
3x2y?6xy??2xy?
31??x?2??x+2???x+1??x?3? 32??1?3y??1+3y??1+9y2?
33??ab+1?2??ab?1?2
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34??998?235?197203
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