平方差,完全平方差，公式练习题100道 急求50道初2上学期平方差完全平方公式的题100分送
\u6c42100\u9053\u5173\u4e8e\u5e73\u65b9\u5dee\u516c\u5f0f\u7684\u9898\u76ee\u548c\u7b54\u6848\u4e00\u3001\u586b\u7a7a\u9898
1.(a+b)(a\uff0db)=_____,\u516c\u5f0f\u7684\u6761\u4ef6\u662f_____\uff0c\u7ed3\u8bba\u662f_____.
2.(x\uff0d1)(x+1)=_____,(2a+b)(2a\uff0db)=_____,( x\uff0dy)( x+y)=_____.
3.(x+4)(\uff0dx+4)=_____,(x+3y)(_____)=9y2\uff0dx2,(\uff0dm\uff0dn)(_____)=m2\uff0dn2
4.98\u00d7102=(_____)(_____)=( )2\uff0d( )2=_____.
5.\uff0d(2x2+3y)(3y\uff0d2x2)=_____.
6.(a\uff0db)(a+b)(a2+b2)=_____.
7.(_____\uff0d4b)(_____+4b)=9a2\uff0d16b2,(_____\uff0d2x)(_____\uff0d2x)=4x2\uff0d25y2
8.(xy\uff0dz)(z+xy)=_____,( x\uff0d0.7y)( x+0.7y)=_____.
9.( x+y2)(_____)=y4\uff0d x2
10.\u89c2\u5bdf\u4e0b\u5217\u5404\u5f0f\uff1a
(x\uff0d1)(x+1)=x2\uff0d1
(x\uff0d1)(x2+x+1)=x3\uff0d1
(x\uff0d1)(x3+x2+x+1)=x4\uff0d1
\u6839\u636e\u524d\u9762\u5404\u5f0f\u7684\u89c4\u5f8b\u53ef\u5f97
(x\uff0d1)(xn+xn\uff0d1+\u2026+x+1)=_____.
\u4e8c\u3001\u9009\u62e9\u9898
11.\u4e0b\u5217\u591a\u9879\u5f0f\u4e58\u6cd5\uff0c\u80fd\u7528\u5e73\u65b9\u5dee\u516c\u5f0f\u8fdb\u884c\u8ba1\u7b97\u7684\u662f( )
A.(x+y)(\uff0dx\uff0dy)
B.(2x+3y)(2x\uff0d3z)
C.(\uff0da\uff0db)(a\uff0db)
D.(m\uff0dn)(n\uff0dm)
12.\u4e0b\u5217\u8ba1\u7b97\u6b63\u786e\u7684\u662f( )
A.(2x+3)(2x\uff0d3)=2x2\uff0d9
B.(x+4)(x\uff0d4)=x2\uff0d4
C.(5+x)(x\uff0d6)=x2\uff0d30
D.(\uff0d1+4b)(\uff0d1\uff0d4b)=1\uff0d16b2
13.\u4e0b\u5217\u591a\u9879\u5f0f\u4e58\u6cd5\uff0c\u4e0d\u80fd\u7528\u5e73\u65b9\u5dee\u516c\u5f0f\u8ba1\u7b97\u7684\u662f( )
A.(\uff0da\uff0db)(\uff0db+a)
B.(xy+z)(xy\uff0dz)
C.(\uff0d2a\uff0db)(2a+b)
D.(0.5x\uff0dy)(\uff0dy\uff0d0.5x)
14.(4x2\uff0d5y)\u9700\u4e58\u4ee5\u4e0b\u5217\u54ea\u4e2a\u5f0f\u5b50\uff0c\u624d\u80fd\u4f7f\u7528\u5e73\u65b9\u5dee\u516c\u5f0f\u8fdb\u884c\u8ba1\u7b97( )
A.\uff0d4x2\uff0d5y
B.\uff0d4x2+5y
C.(4x2\uff0d5y)2
D.(4x+5y)2
15.a4+(1\uff0da)(1+a)(1+a2)\u7684\u8ba1\u7b97\u7ed3\u679c\u662f( )
A.\uff0d1
B.1
C.2a4\uff0d1
D.1\uff0d2a4
16.\u4e0b\u5217\u5404\u5f0f\u8fd0\u7b97\u7ed3\u679c\u662fx2\uff0d25y2\u7684\u662f( )
A.(x+5y)(\uff0dx+5y)
B.(\uff0dx\uff0d5y)(\uff0dx+5y)
C.(x\uff0dy)(x+25y)
D.(x\uff0d5y)(5y\uff0dx)
\u4e09\u3001\u89e3\u7b54\u9898
17.1.03\u00d70.97
18.(\uff0d2x2+5)(\uff0d2x2\uff0d5)
19.a(a\uff0d5)\uff0d(a+6)(a\uff0d6)
20.(2x\uff0d3y)(3y+2x)\uff0d(4y\uff0d3x)(3x+4y)
21.( x+y)( x\uff0dy)( x2+y2)
22.(x+y)(x\uff0dy)\uff0dx(x+y)
23.3(2x+1)(2x\uff0d1)\uff0d2(3x+2)(2\uff0d3x)
24.9982\uff0d4
*25.2003\u00d72001\uff0d20022
\u7b54\u6848
\u4e00\u30011.a2\uff0db2 \u4e24\u6570\u7684\u548c\u4e0e\u8fd9\u4e24\u6570\u7684\u5dee\u76f8\u4e58 \u8fd9\u4e24\u4e2a\u6570\u7684\u5e73\u65b9\u5dee
2.x2\uff0d1 4a2\uff0db2 x2\uff0dy2
3.16\uff0dx2 \uff0dx+3y \uff0dm+n
4.100\uff0d2 100+2 100 2 9996
5.4x4\uff0d9y2 6.a4\uff0db4
7.3a 3a 5y \uff0d5y
8.x2y2\uff0dz2 x2\uff0d0.49y2
9.\uff0d x+y2 10.xn+1\uff0d1
\u4e8c\u300111.C 12.D 13.C 14.A 15.B 16.B
\u4e09\u300117.0.9991 18.4x4\uff0d25 19.\uff0d5a+36
20.13x2\uff0d25y2 21. x4\uff0dy422.\uff0dy2\uff0dxy 23.30x2\uff0d11
24.996000 *25.\uff0d1
1\uff0e\u5206\u89e3\u56e0\u5f0f\uff1a(x2+3x)2-2(x2+3x)\uff0d8\uff1d \uff0e
2\uff0e\u5206\u89e3\u56e0\u5f0f\uff1a(x2+x+1)(x2+x+2)\uff0d12= \uff0e
3\uff0e\u5206\u89e3\u56e0\u5f0f\uff1ax2\uff0dxy\uff0d2y2\uff0dx\uff0dy= \uff0e (\u91cd\u5e86\u5e02\u4e2d\u8003\u9898)
4\uff0e\u5df2\u77e5\u4e8c\u6b21\u4e09\u9879\u5f0f \u5728\u6574\u6570\u8303\u56f4\u5185\u53ef\u4ee5\u5206\u89e3\u4e3a\u4e24\u4e2a\u4e00\u6b21\u56e0\u5f0f\u7684\u79ef\uff0c\u5219\u6574\u6570m\u7684\u53ef\u80fd\u53d6\u503c\u4e3a \uff0e
5\uff0e\u5c06\u591a\u9879\u5f0f \u5206\u89e3\u56e0\u5f0f\uff0c\u7ed3\u679c\u6b63\u786e\u7684\u662f\uff08 \uff09\uff0e
A\uff0e B\uff0e C\uff0e D\uff0e
(\u5317\u4eac\u4e2d\u8003\u9898)
6\uff0e\u4e0b\u52175\u4e2a\u591a\u9879\u5f0f\uff1a
\u2460 \uff1b\u2461 \uff1b\u2462 \uff1b\u2463 \uff1b\u2464
\u5176\u4e2d\u5728\u6709\u7406\u6570\u8303\u56f4\u5185\u53ef\u4ee5\u8fdb\u884c\u56e0\u5f0f\u5206\u89e3\u7684\u6709\uff08 \uff09\uff0e
A\uff0e\u2460\u3001\u2461\u3001\u2462 B\uff0e\u2461\u3001\u2462 \u3001\u2463 C\uff0e\u2460\u2462 \u3001\u2463\u3001\u2464 D\uff0e\u2460\u3001\u2461\u3001\u2463
7\uff0e\u4e0b\u5217\u5404\u5f0f\u5206\u89e3\u56e0\u5f0f\u540e\uff0c\u53ef\u8868\u793a\u4e3a\u4e00\u6b21\u56e0\u5f0f\u4e58\u79ef\u7684\u662f( )\uff0e
A\uff0e B\uff0e C\uff0e D\uff0e
(\u201c\u5e0c\u671b\u676f\u201d\u9080\u8bf7\u8d5b\u8bd5\u9898)
8\uff0e\u82e5 \uff0c \uff0c\u5219 \u7684\u503c\u4e3a( )\uff0e
A\uff0e B\uff0e C\uff0e D\uff0e0 (\u5927\u8fde\u5e02\u201c\u80b2\u82f1\u676f\u201d\u7ade\u8d5b\u9898)
9\uff0e\u5206\u89e3\u56e0\u5f0f
\uff081\uff09(x2+4x+8)2+3x(x2+4x+8)+2x2\uff1b
(2)(2x2\uff0d3x+1)2\u4e0022x2+33x\uff0d1\uff1b
(3)x4+2001x2+2000x+2001\uff1b
(4)(6x\uff0d1)(2 x\uff0d1)(3 x\uff0d1)( x\uff0d1)+x2\uff1b
(5) \uff1b
(6) \uff0e (\u201c\u5e0c\u671b\u676f\u201d\u9080\u8bf7\u8d5b\u8bd5\u9898)
10\uff0e\u5206\u89e3\u56e0\u5f0f\uff1a = \uff0e
11\uff0e\u5206\u89e3\u56e0\u5f0f\uff1a = \uff0e
12\uff0e\u5206\u89e3\u56e0\u5f0f\uff1a = \uff0e\uff08 \u201c\u4e94\u7f8a\u676f\u201d\u7ade\u8d5b\u9898\uff09
13\uff0e\u57281~100\u4e4b\u95f4\u82e5\u5b58\u5728\u6574\u6570n\uff0c\u4f7f \u80fd\u5206\u89e3\u4e3a\u4e24\u4e2a\u6574\u7cfb\u6570\u4e00\u6b21\u5f0f\u7684\u4e58\u79ef\uff0c\u8fc7\u6837\u7684n\u6709 \u4e2a\uff0e (\u5317\u4eac\u5e02\u7ade\u8d5b\u9898)
14\uff0e \u7684\u56e0\u5f0f\u662f( )
A\uff0e B\uff0e C\uff0e D\uff0e E\uff0e
15\uff0e\u5df2\u77e5 \uff0cM= \uff0cN= \uff0c\u5219M\u4e0eN\u7684\u5927\u5c0f\u5173\u7cfb\u662f( )
A\uff0eM N C\uff0eM\uff1dN D\uff0e\u4e0d\u80fd\u786e\u5b9a
(\u7b2c \u201c\u5e0c\u671b\u676f\u201d\u9080\u8bf7\u8d5b\u8bd5\u9898)
16\uff0e\u628a\u4e0b\u5217\u5404\u5f0f\u5206\u89e3\u56e0\u5f0f\uff1a
(1) \uff1b
(2) \uff1b (\u6e56\u5317\u7701\u9ec4\u5188\u5e02\u7ade\u8d5b\u9898)
(3) \uff1b (\u5929\u6d25\u5e02\u7ade\u8d5b\u9898)
(4) \uff1b\uff08\u201c\u4e94\u7f8a\u676f\u201d\u7ade\u8d5b\u9898\uff09
(5) \uff0e (\u5929\u6d25\u5e02\u7ade\u8d5b\u9898)
17\uff0e\u5df2\u77e5\u4e58\u6cd5\u516c\u5f0f\uff1a
\uff1b
\uff0e
\u5229\u7528\u6216\u8005\u4e0d\u5229\u7528\u4e0a\u8ff0\u516c\u5f0f\uff0c\u5206\u89e3\u56e0\u5f0f\uff1a (\u201c\u7956\u51b2\u4e4b\u676f\u201d\u9080\u8bf7\u8d5b\u8bd5\u9898)
18\uff0e\u5df2\u77e5\u5728\u0394ABC\u4e2d\uff0c (a\u3001b\u3001c\u662f\u4e09\u89d2\u5f62\u4e09\u8fb9\u7684\u957f)\uff0e
\u6c42\u8bc1\uff1a (\u5929\u6d25\u5e02\u7ade\u8d5b\u9898)
\u5b66\u529b\u8bad\u7ec3
1\uff0e\u5df2\u77e5x+y\uff1d3\uff0c \uff0c\u90a3\u4e48 \u7684\u503c\u4e3a \uff0e
2\uff0e\u65b9\u7a0b \u7684\u6574\u6570\u89e3\u662f \uff0e ( \u201c\u5e0c\u671b\u676f\u201d\u9080\u8bf7\u8d5b\u8bd5\u9898)
3\uff0e\u5df2\u77e5a\u3001b\u3001c\u3001d\u4e3a\u975e\u8d1f\u6574\u6570\uff0c\u4e14ac+bd+ad+bc=1997\uff0c\u5219a+b+c+d\uff1d \uff0e
4\uff0e\u5bf9\u4e00\u5207\u5927\u4e8e2\u7684\u6b63\u6574\u6570n\uff0c\u6570n5\u4e005n3+4n\u7684\u91cf\u5927\u516c\u7ea6\u6570\u662f \uff0e
(\u56db\u5ddd\u7701\u7ade\u8d5b\u9898)
5\uff0e\u5df2\u77e5724\uff0d1\u53ef\u88ab40\u81f350\u4e4b\u95f4\u7684\u4e24\u4e2a\u6574\u6570\u6574\u9664\uff0c\u8fd9\u4e24\u4e2a\u6574\u6570\u662f( )
A\uff0e41\uff0c48 B\uff0e45\uff0c47 C\uff0e43\uff0c48 D\uff0e4l\uff0c47
6\uff0c\u5df2\u77e52x2\uff0d3xy+y2\uff1d0(xy\u22600)\uff0c\u5219 \u7684\u503c\u662f( )
A\uff0e 2\uff0c B\uff0e2 C\uff0e D\uff0e\uff0d2\uff0c
7\uff0ea\u3001b\u3001c\u662f\u6b63\u6574\u6570\uff0ca>b\uff0c\u4e14a2-ac+bc=7\uff0c\u5219a\u2014c\u7b49\u4e8e( )
A\uff0e\u4e002 B\uff0e\u4e001 C\uff0e0 D\uff0e 2
(\u6c5f\u82cf\u7701\u7ade\u8d5b\u9898)
8\uff0e\u5982\u679c \uff0c\u90a3\u4e48 \u7684\u503c\u7b49\u4e8e( )
A\uff0e1999 B\uff0e2001 C\uff0e2003 D\uff0e2005
\uff08\u6b66\u6c49\u5e02\u9009\u62d4\u8d5b\u8bd5\u9898\uff09
9\uff0e(1)\u6c42\u8bc1\uff1a8l7\u4e00279\u2014913\u80fd\u88ab45\u6574\u9664\uff1b
(2)\u8bc1\u660e\uff1a\u5f53n\u4e3a\u81ea\u7136\u6570\u65f6\uff0c2(2n+1)\u5f62\u5f0f\u7684\u6570\u4e0d\u80fd\u8868\u793a\u4e3a\u4e24\u4e2a\u6574\u6570\u7684\u5e73\u65b9\u5dee\uff1b
\uff083\uff09\u8ba1\u7b97\uff1a
10\uff0e\u82e5a\u662f\u81ea\u7136\u6570\uff0c\u5219a4\uff0d3a+9\u662f\u8d28\u6570\u8fd8\u662f\u5408\u6570?\u7ed9\u51fa\u4f60\u7684\u8bc1\u660e\uff0e
(\u201c\u4e94\u57ce\u5e02\u201d\u8054\u8d5b\u9898)
11\uff0e\u5df2\u77e5a\u3001b\u3001c\u6ee1\u8db3a+b\uff1d5\uff0cc2\uff1dab+b\uff0d9\uff0c\u5219c\uff1d \uff0e (\u6c5f\u82cf\u7701\u7ade\u8d5b\u9898)
12\uff0e\u5df2\u77e5\u6b63\u6570a\u3001b\u3001c\u6ee1\u8db3ab+a+b=bc+b+c=ac+a+c\uff0c\u5219(a+1)(b+1)(c+1)= \uff0e(\u5317\u4eac\u5e02\u7ade\u8d5b\u9898)
13\uff0e\u6574\u6570a\u3001b\u6ee1\u8db36ab\uff1d9a\u2014l0b+303\uff0c\u5219a+b= \uff0e(\u201c\u7956\u51b2\u4e4b\u676f\u201d\u9080\u8bf7\u8d5b\u8bd5\u9898)
14\uff0e\u5df2\u77e5 \uff0c\u4e14 \uff0c\u5219 \u7684\u503c\u7b49\u4e8e \uff0e
( \u201c\u5e0c\u671b\u676f\u201d\u9080\u8bf7\u8d5b\u8bd5\u9898)
15\uff0e\u8bbea<b<c<d\uff0c\u5982\u679cx=(a\uff0bb)(c\uff0bd)\uff0cy=(a+c)(b+d)\uff0cz\uff1d(a+d)(b+c)\uff0c\u90a3\u4e48x\u3001y\u3001z\u7684\u5927\u5c0f\u5173\u7cfb\u4e3a( )
A\uff0ex<y<z B\uff0e y<z<x C\uff0ez <x<y D\uff0e\u4e0d\u80fd\u786e\u5b9a
16\uff0e\u82e5x+y=\uff0d1\uff0c\u5219 \u7684\u503c\u7b49\u4e8e( )
A\uff0e0 B\uff0e\uff0d1 C\uff0e1 D\uff0e 3
( \u201c\u5e0c\u671b\u676f\u201d\u9080\u8bf7\u8d5b\u8bd5\u9898)
17\uff0e\u5df2\u77e5\u4e24\u4e2a\u4e0d\u540c\u7684\u8d28\u6570p\u3001q\u6ee1\u8db3\u4e0b\u5217\u5173\u7cfb \uff1a \uff0c \uff0cm\u662f\u9002\u5f53\u7684\u6574\u6570\uff0c\u90a3\u4e48 \u7684\u6570\u503c\u662f( )
A\uff0e4004006 B\uff0e3996005 C\uff0e3996003 D\uff0e4004004
18\uff0e\u8bben\u4e3a\u67d0\u4e00\u81ea\u7136\u6570\uff0c\u4ee3\u5165\u4ee3\u6570\u5f0fn3\uff0dn\u8ba1\u7b97\u5176\u503c\u65f6\uff0c\u56db\u4e2a\u5b66\u751f\u7b97\u51fa\u4e86\u4e0b\u5217\u56db\u4e2a\u7ed3\u679c\uff0e\u5176\u4e2d\u6b63\u786e\u7684\u7ed3\u679c\u662f( )
A\uff0e5814 B\uff0e5841 C\uff0e8415 D\uff0e845l (\u9655\u897f\u7701\u7ade\u8d5b\u9898)
19\uff0e\u6c42\u8bc1\uff1a\u5b58\u5728\u65e0\u7a77\u591a\u4e2a\u81ea\u7136\u6570k\uff0c\u4f7f\u5f97n4+k\u4e0d\u662f\u8d28\u6570\uff0e
20\uff0e\u67d0\u6821\u5728\u5411\u201c\u5e0c\u671b\u5de5\u7a0b\u201d\u6350\u6551\u6d3b\u52a8\u4e2d\uff0c\u7532\u73ed\u7684m\u4e2a\u7537\u751f\u548c11\u4e2a\u5973\u751f\u7684\u6350\u6b3e\u603b\u6570\u4e0e\u4e59\u73ed\u76849\u4e2a\u7537\u751f\u548cn\u4e2a\u5973\u751f\u7684\u6350\u6b3e\u603b\u6570\u76f8\u7b49\uff0c\u90fd\u662f(mn+9m+11n+145)\u5143\uff0c\u5df2\u77e5\u6bcf\u4eba\u7684\u6350\u6b3e\u6570\u76f8\u540c\uff0c\u4e14\u90fd\u662f\u6574\u6570\uff0c\u6c42\u6bcf\u4eba\u7684\u6350\u6b3e\u6570\uff0e (\u5168\u56fd\u521d\u4e2d\u6559\u5b66\u8054\u8d5b\u9898)
21\uff0e\u5df2\u77e5b\u3001c\u662f\u6574\u6570\uff0c\u4e8c\u6b21\u4e09\u9879\u5f0fx2+bx\uff0bc\u65e2\u662fx4+6x2+25\u7684\u4e00\u4e2a\u56e0\u5f0f\uff0c\u4e5f\u662fx3+4x2+28x+5\u7684\u4e00\u4e2a\u56e0\u5f0f\uff0c\u6c42x\uff1d1\u65f6\uff0cx2+bx\uff0bc\u7684\u503c\uff0e
(\u7f8e\u56fd\u4e2d\u5b66\u751f\u6570\u5b66\u7ade\u8d5b\u9898)
22\uff0e\u6309\u4e0b\u9762\u89c4\u5219\u6269\u5145\u65b0\u6570\uff1a
\u5df2\u6709\u4e24\u6570a\u3001b\uff0c\u53ef\u6309\u89c4\u5219c=ab+a+b\u6269\u5145\u4e00\u4e2a\u65b0\u6570\uff0c\u5728a\u3001b\u3001c\u4e09\u4e2a\u6570\u4e2d\u4efb\u53d6\u4e24\u6570\uff0c\u6309\u89c4\u5219\u53c8\u53ef\u6269\u5145\u4e00\u4e2a\u65b0\u6570\uff0c\u2026\u2026\u6bcf\u6269\u5145\u4e00\u4e2a\u65b0\u6570\u53eb\u505a\u4e00\u6b21\u64cd\u4f5c\uff0e
\u73b0\u6709\u65701\u548c4\uff0c(1)\u6c42\u6309\u4e0a\u8ff0\u89c4\u5219\u64cd\u4f5c\u4e09\u6b21\u5f97\u5230\u6269\u5145\u7684\u6700\u5927\u65b0\u6570\uff1b(2)\u80fd\u5426\u901a\u8fc7\u4e0a\u8ff0\u89c4\u5219\u6269\u5145\u5f97\u5230\u65b0\u65701999\uff0c\u5e76\u8bf4\u660e\u7406\u7531\uff0e (\u91cd\u5e86\u5e02\u7ade\u8d5b\u9898)
1\uff0e(1)\u5b8c\u6210\u4e0b\u5217\u914d\u65b9\u95ee\u9898\uff1a
\uff08\u6c5f\u897f\u7701\u4e2d\u8003\u9898\uff09
\uff082\uff09\u5206\u89e3\u56e0\u5f0f\uff1a \u7684\u7ed3\u679c\u662f \uff0e(\u90d1\u5dde\u5e02\u7ade\u8d5b\u9898)
2\uff0e\u82e5 \u6709\u4e00\u4e2a\u56e0\u5f0f\u662fx+1\uff0c\u5219 \uff1d \uff0e
3\uff0e\u82e5 \u662f\u5b8c\u5168\u5e73\u65b9\u5f0f\uff0c\u5219 = \uff0e
(2003\u5e74\u9752\u5c9b\u5e02\u4e2d\u8003\u9898)
4\uff0e\u5df2\u77e5\u591a\u9879\u5f0f \u53ef\u4ee5i\u5206\u89e3\u4e3a \u7684\u5f62\u5f0f\uff0c\u90a3\u4e48 \u7684\u503c\u662f \uff0e ( \u201c\u5e0c\u671b\u676f\u201d\u9080\u8bf7\u8d5b\u8bd5\u9898)
5\uff0e\u5df2\u77e5 \uff0c\u5219 \u7684\u503c\u4e3a( )
A\uff0e3 B\uff0e C\uff0e D\uff0e
6\uff0e\u5982\u679c a\u3001b\u662f\u6574\u6570\uff0c\u4e14 \u662f \u7684\u56e0\u5f0f\uff0e\u90a3\u4e48b\u7684\u503c\u4e3a( )
A\uff0e\uff0d2 B\uff0e\uff0dl C\uff0e0 D\uff0e2
(\u6c5f\u82cf\u7701\u7ade\u8d5b\u9898)
7\uff0e d\u5206\u89e3\u56e0\u5f0f\u7684\u7ed3\u679c\u662f\uff08 \uff09
A\uff0e B\uff0e
C\uff0e D\uff0e
(\u5317\u4eac\u5e02\u7ade\u8d5b\u9898)
8\uff0e\u628a\u4e0b\u5217\u5404\u5f0f\u5206\u89e3\u56e0\u5f0f\uff1a
(1) \uff1b (2) \uff1b
(3) \uff1b
\uff084\uff09 \uff1b (\u6606\u660e\u5e02\u7ade\u8d5b\u9898)
(5) \uff1b \uff08\u201c\u7956\u51b2\u4e4b\u676f\u201d\u9080\u8bf7\u8d5b\u8bd5\u9898\uff09
\uff086\uff09 (\u91cd\u5e86\u5e02\u7ade\u8d5b\u9898)
9\uff0e\u5df2\u77e5 \u662f \u7684\u4e00\u4e2a\u56e0\u5f0f\uff0c\u6c42 \u7684\u503c\uff0e
\uff08\u7b2c15\u5c4a\u201c\u5e0c\u671b\u676f\u201d\u9080\u8bf7\u8d5b\u8bd5\u9898\uff09
10\uff0e\u5df2\u77e5 \u662f\u591a\u9879\u5f0f \u7684\u56e0\u5f0f\uff0c\u5219 \uff1d \uff0e
(\u7b2c15\u5c4a\u6c5f\u82cf\u7701\u7ade\u8d5b\u9898)
11\uff0e\u4e00\u4e2a\u4e8c\u6b21\u4e09\u9879\u5f0f\u7684\u5b8c\u5168\u5e73\u65b9\u5f0f\u662f \uff0c\u90a3\u4e48\u8fd9\u4e2a\u4e8c\u6b21\u4e09\u9879\u5f0f\u662f \uff0e
(\u91cd\u5e86\u5e02\u7ade\u8d5b\u9898)
12\uff0e\u5df2\u77e5 \uff0c\u5219 = \uff0e
(\u5317\u4eac\u5e02\u7ade\u8d5b\u9898)
13\uff0e\u5df2\u77e5 \u4e3a\u6b63\u6574\u6570\uff0c\u4e14 \u662f\u4e00\u4e2a\u5b8c\u5168\u5e73\u65b9\u6570\uff0c\u5219 \u7684\u503c\u4e3a \uff0e
14\uff0e\u8bbem\u3001n\u6ee1\u8db3 \uff0c\u5219 =( )
A\uff0e(2\uff0c2)\u6216(\uff0d2\uff0c\uff0d2) B\uff0e(2\uff0c2)\u6216(2\uff0c\uff0d2)
C\uff0e(2\uff0c\uff0d2)\u6216(\uff0d2\uff0c2) D\uff0e(\uff0d2\uff0c\uff0d2)\u6216(\uff0d2\uff0c2)
15\uff0e\u5c06 \u56e0\u5f0f\u5206\u89e3\u5f97( )
A\uff0e B\uff0e
C\uff0e D\uff0e
16\uff0e\u82e5 a\u3001b\u3001c\u3001d\u90fd\u662f\u6b63\u6570\uff0c\u5219\u5728\u4ee5\u4e0b\u547d\u9898\u4e2d\uff0c\u9519\u8bef\u7684\u662f( )
A\uff0e\u82e5 \uff0c\u5219
B\uff0e\u82e5 \uff0c\u5219
C\uff0e\u82e5 \uff0c\u5219
D\uff0e\u82e5 \uff0c\u5219
17\uff0e\u628a\u4e0b\u5217\u5404\u5f0f\u5206\u89e3\u56e0\u5f0f\uff1a
(1) \uff1b (2) \uff1b
(3) \uff1b (4) \uff1b
(5) (2003\u5e74\u6cb3\u5357\u7701\u7ade\u8d5b\u9898)
18\uff0e\u5df2\u77e5\u5173\u4e8ex\u3001y\u7684\u4e8c\u6b21\u5f0f \u53ef\u5206\u89e3\u4e3a\u4e24\u4e2a\u4e00\u6b21\u56e0\u5f0f\u7684\u4e58\u79ef\uff0c\u6c42m\u7684\u503c\uff0e (\u5927\u539f\u5e02\u7ade\u8d5b\u9898)
19\uff0e\u8bc1\u660e\u6052\u7b49\u5f0f\uff1a (\u5317\u4eac\u5e02\u7ade\u8d5b\u9898)
20\uff0e\u4e00\u4e2a\u81ea\u7136\u6570a\u82e5\u6070\u597d\u7b49\u4e8e\u53e6\u4e00\u4e2a\u81ea\u7136\u6570b\u7684\u5e73\u65b9\uff0c\u5219\u79f0\u81ea\u7136\u6570a\u4e3a\u5b8c\u5168\u5e73\u65b9\u6570\uff0e\u598264\uff1d82\uff0c64\u5c31\u662f\u4e00\u4e2a\u5b8c\u5168\u5e73\u65b9\u6570\uff0c\u5df2\u77e5a\uff1d20012+20012\u00d7 20022\u534120022\uff0c\u6c42\u8bc1\uff1aa\u662f\u4e00\u4e2a\u5b8c\u5168\u5e73\u65b9\u6570\uff0e(\u5e0c\u671b\u676f\u9898)
1．平方差公式（a+b）（a－b）=a － b 中字母a，b表示（ ）
A．只能是数 B．只能是单项式 C．只能是多项式 D．以上都可以 2．下列多项式的乘法中，可以用平方差公式计算的是（ ） A．（a+b）（b+a） B．（－a+b）（a－b） C．（ a+b）（b－a） D．（a2－b）（b2+a） 3．下列计算中，错误的有（ ） ①（3a+4）（3a－4）=9a －4；②（2a －b）（2a +b）=4a －b ； ③（3－x）（x+3）=x －9；④（－x+y）·（x+y）=－（x－y）（x+y）=－x －y ． A．1个 B．2个 C．3个 D．4个 4．若x －y =30，且x－y=－5，则x+y的值是（ ） A．5 B．6 C．－6 D．－5 二、填空题 5．（－2x+y）（－2x－y）=______． 6．（－3x +2y ）（______）=9x －4y ． 7．（a+b－1）（a－b+1）=____________
8．两个正方形的边长之和为5，边长之差为2，那么用较大的正方形的面积减去较小的正方形的面积，差是_____． 9．利用平方差公式计算： （1）2009×2007－2008 ．（2）．
10. 解方程：x（x+2）+（2x+1）（2x－1）=5（x2+3）
11．（规律探究题）已知x≠1，计算（1+x）（1－x）=1－x2，（1－x）（1+x+x2）=1－x3， （1－x）（•1+x+x2+x3）=1－x4．
（1）观察以上各式并猜想：（1－x）（1+x+x2+…+xn）=______．（n为正整数） （2）根据你的猜想计算：
①（1－2）（1+2+22+23+24+25）=______． ②2+22+23+…+2n=______（n为正整数）． ③（x－1）（x99+x98+x97+…+x2+x+1）=_______． （3）通过以上规律请你进行下面的探索： ①（a－b）（a+b）=_______． ②（a－b）（a2+ab+b2）=______． ③（a－b）（a3+a2b+ab2+b3）=______．
12，判断正误 （1）（a-b）=a - b ( ) （2）（-a-b）=（a+b） =a+2ab+b (
绛旓細骞虫柟宸叕寮 (a+b)(a-b) = a2-b2 瀹屽叏骞虫柟鍏紡(a+b)2=a2+2ab+b2 (a-b)2=a2-2ab+b2 缁冧範棰 鈶狅細104²锛堝阀绠楋級瑙ｏ細鍘熷紡=100²+2脳100脳4+4²=10000+800+16 =1086 鈶★細198²=锛200-2锛²瑙ｏ細鍘熷紡=200²-2脳200脳2+2²=40000-800+4...
绛旓細锛漻2+4y2+9z2-4xy+6xz-12yz锛庝緥锛氳繍鐢ㄥ叕寮忚绠(4a-3b+c)(4a+3b+c)瑙ｏ細(4a-3b+c)(4a+3b+c)锛漑(4a+c)-3b][(4a+c)+3b]锛(4a+c)2-(3b)2 锛16a2+8ac+c2-9b2锛庢湰棰樻槸骞虫柟宸叕寮涓瀹屽叏骞虫柟鍏紡缁煎悎杩愮敤鐨勮绠楅锛庡厛杩愮敤骞虫柟宸叕寮忎氦鎹㈡垚鍚岄」鍦ㄥ墠鐩稿弽椤瑰湪鍚庝负(4a+c-3b)(4a...
绛旓細骞虫柟宸叕寮廰^2-b^2=(a-b)(a+b)瀹屽叏骞虫柟宸叕寮(a-b)^2=a^2-2ab+b^2 (a+b)^2=a^2+2ab+b^2 涓銆(2m-3n)(3n+2m)=(2m)^2-(3n)^2=4m^2-9n^2 浜屻侊紙4y+3x锛夛紙-4y+3x锛=(4y)^2-(3x)^2=16y^2-9x^2 涓夈侊紙-1/2x+2y锛夛紙-1/2x-2y锛=(-1/2x)^2-(2y)^...
绛旓細濡傚浘鎵绀
绛旓細6锛0锛渁鈮5锛宎涓烘暣鏁帮紝鑻2x2锛3x锛媋鑳界敤鍗佸瓧鐩镐箻娉曞垎瑙ｅ洜寮忥紝姹傜鍚堟潯浠剁殑a 鐙珛璁粌锛 1锛庡椤瑰紡x2锛峺2, x2锛2xy锛媦2, x3锛峺3鐨勫叕鍥犲紡鏄 銆 2锛庡～涓婇傚綋鐨勬暟鎴栧紡锛屼娇宸﹁竟鍙垎瑙ｄ负鍙宠竟鐨勭粨鏋滐細 (1)9x2锛( )2锛(3x锛 )( 锛15 y), (2).5x2锛6xy锛8y2锛(x )( 锛4y)...
绛旓細1.(a+2b)(a-2b)-(a+b)^2 鍘熷紡=a²-4b²-a²-2ab-b² =-5b²-2ab 2. (x-½)^2-(x-i)(x-2) 鍘熷紡=x²-1/4x+1/4-x²+2x+ix-2i =2鍙1/4+ix-2i 2012-03-31
绛旓細锛庯紙2锛夋柟绋嬪彉涓猴紙2x-1锛 2 -锛坸-3锛 2 =0锛屾墍浠锛2x-1锛+锛坸-3锛塢[锛2x-1锛-锛坸-3锛塢=0锛屽嵆3x-4=0锛寈+2=0锛屽緱x 1 = 4 3 锛寈 2 =-2锛庯紙3锛夊師鏂圭▼鍙樹负[3锛坸+1锛塢 2 -[2锛坸-1锛塢 2 =0锛屾墍浠3锛坸+1锛+2锛坸-1锛塢[3锛坸+1锛-2锛...
绛旓細鍘熷紡=锛100-0.2锛夛紙100+0.2锛=100²-0.2²=10000-0.04 =9999.96 鍘熷紡=2014²-(2014+1)(2014-1)=2014²-2014²+1 =1 鍘熷紡=(4m²+n²)(4m²-n²)=16m^4-n^4
绛旓細涓銆侀夋嫨棰 1锛骞虫柟宸叕寮锛坅+b锛夛紙a锛峛锛=a 锛 b 涓瓧姣峚锛宐琛ㄧず锛 锛堿锛庡彧鑳芥槸鏁 B锛庡彧鑳芥槸鍗曢」寮 C锛庡彧鑳芥槸澶氶」寮 D锛庝互涓婇兘鍙互 2锛庝笅鍒楀椤瑰紡鐨勪箻娉曚腑锛屽彲浠ョ敤骞虫柟宸叕寮忚绠楃殑鏄紙 锛 A锛庯紙a+b锛夛紙b+a锛 B锛庯紙锛峚+b锛夛紙a锛峛锛 C锛庯紙 a+b锛夛紙b锛峚...
