å®å
¨å¹³æ¹å
¬å¼åæ¥ç»ä¹
1.éæ©é¢
(1)ä¸åçå¼æç«çæ¯( )
A.(aï¼b)^2=a^2ï¼ab+b^2
B.(a+3b)^2=a^2+9b^2
C.(a+b)^2=a^2+2ab+b^2
D.(x+9)(xï¼9)=x^2ï¼9
(2)(a+3b)^2ï¼(3a+b)^2计ç®ç»ææ¯( )
A.8(aï¼b)^2
B.8(a+b)^2
C.8b^2ï¼8a^2
D.8a^2ï¼8b^2
(3)(5x^2ï¼4y^2)(ï¼5x^2+4y^2)è¿ç®çç»ææ¯( )
A.ï¼25x^4ï¼16y^4
B.ï¼25x^4+40x^2y^2ï¼16y^4
C.25x^4ï¼16y^2
D.25x^4ï¼40x^2y^2+16y^4
(4)è¿ç®ç»æ为x^4y^2ï¼2x^2y+1çæ¯( )
A.(x^2y^2ï¼1)^2
B.(x^2y+1)^2
C.(x^2yï¼1)^2
D.(ï¼x^2yï¼1)^2
2.填空é¢
(1)(4aï¼b^2)^2= .
(2)(ï¼ mï¼1)^2= .
(3)(m+n+1)(1ï¼mï¼n)= .
(4)(7a+A)^2=49a^2ï¼14ab^2+B,åA= ,B= .
(5)(a+2b)^2ï¼ =(aï¼2b)^2.
3.ç¨ä¹æ³å
¬å¼è®¡ç®ï¼
(1)999^2;
(2)2002^2ï¼4004Ã2003+2003^2.
4.å·²ç¥,a+b=8,ab=24.æ± (a^2+b^2)çå¼.
5.å·²ç¥x+ 1/x=4,æ±è¯x^2+ 1/x^2.
6.å·²ç¥ï¼x^2ï¼2x+y^2+6y+10=0,æ±x+yçå¼.
åèçæ¡ï¼
1.(1)C (2)C (3)B (4)C
2.(1)16a^2ï¼8ab^2+b^4
(2) m^2+m+1
(3)1ï¼m^2ï¼2mnï¼n^2
(4)ï¼b^2 b^4
(5)8ab
3.(1)998001 (2)1
4. 8
5.14
6.ï¼2
温馨提示:答案为网友推荐,仅供参考