新人教版初中数学第14章 整式的乘法-化简求值专项训练 (124道题)
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类型1 整式的混合运算-化简求值-只化简
1.化简:a (1-a )+(a +1)2-1.
2.计算:(a +3)(a -1)+a (a -2)
3.化简:2a (a -12
)+a . 4.计算:[x (x 2y 2-xy )-y (x 2-x 3y )] ÷x 2y
5.化简:(a +3)(a -3)+a (4-a )
6.化简:(a +b )(a -b )+2b 2.
7.化简:(x +2)2-x (x -3)
8.计算:(3+a )(3-a )+a 2.
9.化简:(a +1)2+2(1-a )
10.化简:(a +b )2+(a -b )(a +b )-2ab ;
11.化简:(x +2)2-x (x -3)
12.化简:(x +1)(x -1)-(x -2)2.
13.化简:x (x -1)+(1-x )(1+x ).
14.计算:[x (x 2y 2-xy )-y (x 2-x 3y )]÷x 2y .
15.计算:(2x +y )2-(2x +3y )(2x -3y ).
16.化简:)2(3)3(+-+a a a .
17.计算:(x -3)2+2x (3+x )
18.化简:(a +3)2+a (4-a )
19.化简:a (b +1)-ab -1.
20.化简:(1+a )(1-a )+a (a -3)
21.化简:(x +1)(x -1)-x 2.
22.计算:(x +1)2-(x +2)(x -2).
23.计算: (-x )2 ? x 3 ? (-2y )3+(-2xy )2 ? (-x )3y
24.化简:(a +3)2+a (2-a ).
25.(a +1)2-a (a -1)
26.化简:a (3+a )-3(a +2).
27.化简:(a +b )2+b (a -b ).
28.化简:()22
()()14a b a b a b +--+-. 29.计算:(a +b )(a -b )+2b 2.
30.a (a -3)+(2-a )(2+a )
31.化简:2
()(2)a b b a b -++
32.计算:(x +1)2-x (x +2)
33.计算:3(x 2+2)-3(x +1)(x -1)
34.计算:(a -2)2+4(a -1)
35.计算:4323323(9)(2)()4a b c a b a bc ÷?-
36.计算:(x +1)2-x (x +2)
37.化简:(a -b )2+a (2b -a )
38.计算:a (a -3)-(a -1)2.
39.化简:(a -1)2+2(a +1)
40.2(2)(1)(1)x x x --+-
41.化简:)8(2
1)2)(2(b a b b a b a --
-+. 42.计算:()()()
2312x x x +--- 43.计算:()()2
121x x ++- 44.化简:(x -y )(x +y )+(x -y )+(x +y )
※45.化简:))(())(())((a c a c c b c b b a b a +-++-++-
类型2 整式的混合运算-化简求值-带求值
46.给出三个整式a 2,b 2和2ab .
(1)当a =3,b =4时,求a 2+b 2+2ab 的值;
(2)在上面的三个整式中任意选择两个整式进行加法或减法运算,使所得的多项式能够因式分解.请写也你所选的式子及因式分解的过程.
47.先化简,再求值:2a (a +2b )-(a +2b )2,其中a =-1,b
48.先化简,再求值:x (x -2)-(x +1)(x -1),其中x =10.
49.先化简,再求值:[(x -3y )2+(x -3y )(x +3y )]÷2x ,其中x =-3,y =1.
50.先化简,再求值.(a +b )(a -b )+b (a +2b )-b 2,其中a =1,b =-2.
51.先化简,再求值:[(a +b )2-(a -b )2]?a ,其中a =-1,b =5.
52.先化简,再求值:(x +2)2+x (2-x ),其中x =.
53.先化简,再求值:(a +2)2+a (a -4),其中a =
.
54.先化简,再求值:(x +5)(x -1)+(x -2)2,其中x =-2.
55.先化简,再求值:a (a -3b )+(a +b )2-a (a -b ),其中a =1,b =-.
56.先化简,再求值:(x +5)(x -1)+(x -2)2,其中x =-2.
57.先化简,再求值:(a +2b )2+(b +a )(b -a ),其中a =-1,b =2.
58.先化简,再求值:(2x -1)2-2(3-2x ),其中x =-2.
59.先化简再求值:(2a +b )(2a -b )+b (2a +b )-4a 2b ÷b .其中a =-12
,b =2.
60.先化简,再求值:(x +3)2-x (x -5),其中x =-12
.
61.先化简,再求值:(a +2)(a -2)+4(a +1)-4a ,其中a =
-1.
62.先化简,再求值:(x +1)(2x -1)-(x -3)2,其中x =-2.
63.先化简,再求值:(x -1)(x +1)-x (x -3),其中x =3.
64.先化简,再求值:(a -b )2+a (2b -a ),其中
,b =3.
65.先化简,再求值:(x +y )(x -y )-(4x 3y -8xy 3)÷2xy ,其中x =-1,y =
3 3.
66.先化简,再求值:2(2)(21)(21)4(1)x x x x x +++--+,其中x =
67.先化简,再求值: ()()()()21313151x x x x x --+-+-,其中2x =-.
68.先化简,再求值:(a +2)(a -2)+2(a 2+3),其中a =13
.
69.求代数式(a +2b )(a -2b )+(a +2b )2-4ab 的值,其中a =1,b =
.
70.先化简,再求值:x (x +1)-(x -1)(x +1),其中x =-1.
71.先化简,再求值:x (4-x )+(x +1)(x -1),其中x =.
72.先化简.再求值:a (a -2b )+2(a +b )(a -b )+(a +b )2,其中a =-12
,b =1.
73.先化简,再求值:(4ab 3-8a 2b 2)÷4ab +(2a +b )(2a -b ),其中a =2,b =1.
74.先化简.再求值:22(1)(1)x x +-+,其中x =
75.先化简,再求值:(a +1) (a -1)+a (1-a ),其中a =2012.
76.先化简,再求值:2(3)(1)(2)x x x +---,其中1x =-.
77.先化简,再求值:)1()2)(2(a a a a -+-+,其中5=a .
78.先化简,再求值:(x +3)(x -3)-x (x -2),其中x =4.
79.先化简,再求值:(x +3)2+(2+x )(2-x ),其中x =-2.
80.先化简,再求值.(x +1)2+x (x -2).其中
.
81.先化简再求值:[(x +2y )(x -2y )-(x +4y )2]÷(4y ),其中x =5,y =2.
82.先化简,再求值: 223(2)()()a b ab b b a b a b --÷-+-,其中112
a b ==-,.
83.先将下列代数式化简,再求值:(a +b )(a -b )+b (b -2),其中a =
,b =1.
84.化简:2[(m -1)m +m (m +1)][(m -1)m -m (m +1)].若m 是任意整数,请观察化简后的结果,你发现原式表示一个什么数?
85.先化简,再求值:22(2)2,3a b b a b --=-=,其中.