2、(2010山东济南)计算:+
)解:原式= ····························································· 1分
= ·········································································· 2分
=-1 ············································································ 3分
1.(2010山东济南)13.分解因式:=
.
答案:
5. (2010黄冈)下列运算正确的是( )D
A. B.
C.
D.
4.(2010黄冈)分解因式:x-x=__________. x(x-1)
3. (2010宁德19)化简:(a+2)(a-2)-a(a+1);
解:原式=
=
2. (2010宁德12)分解因式:ax2+2axy+ay2=______________________. a(x+y)2
1.(2010宁德3)下列运算中,结果正确的是( )A.
A. B.
C.
D.
3、(2010年泉州南安市)因式分解:
答案:(a+3)(a-3)
(2010宁夏1.下列运算正确的是 ( B )
A. B.
C.
D.
(2010宁夏2.把多项式分解因式结果正确的是(
D )
A. B.
C.
D.
(2010山西4.下列运算正确的是()B
A.(a-b)2=a2-b2 B.(-a2)3=-a6 C.x2+x2=x4 D.3a3·2a2=6a6
(2010山西11.计算:9x3÷(-3x2) =______________.-3x
2、(2010年杭州市)先化简, 再求得它的近似值为 .(精确到0.01,
≈1.414,
≈1.732)
答案:5.20
1、(2010年杭州市)分解因式 m3 – 4m =
答案:m(m+2)(m-2)
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