内容发布更新时间 : 2024/12/23 23:18:32星期一 下面是文章的全部内容请认真阅读。
A.
3 5
B.?3 5
C.?5 312 D.
5 32.计算:
(1) (a?b?c)(a?b?c)
(2) 1?(?13)
x2?xy?y2,y?3.设x?,求代数式的值.
x?y3?23?211aba2?b24.当3a?ab?2b?0(a?0,b?0),求??的值.
baab225.设x、y为实数,且xy?3,求x6.已知a?yx的值. ?yxy111 x?20,b?x?19,c?x?21,求代数式a2?b2?c2?ab?bc?ac的值.
2020205?142,求x?x?2x?1的值. 247.设x?8.展开(x?2)
9.计算(x?1)(x?2)(x?3)(x?4)
10.计算(x?y?z)(?x?y?z)(x?y?z)(x?y?z) 11.化简或计算:
(1) (18?4113 ?)?232?3
(2) 221 ?2?(2?5)2?35?2 (3)
xx?xyx?xy?y? 2xy?yxx?yy
(4) (a?b?aba?b)?(aab?b?bab?a?a?bab)
6
第一讲 习题答案 A组
1. C 2. A
3. (1) x?9y?16z?6xy?8xz?24yz
(3) ?3ab?3ab
22222
(2) 3a?5ab?3b?4a?2b?1 (4)
22
13a?16b3 44.?2a?2a ??a 5.mm 2xy B组
2(a?b)2 ??1
a?b21. D 2.a?c?b?2ac,32?23 3. ?4.?3,2
43133 65.?23
2 6. 3
7.3?5
8.x?8x?24x?32x?16 9.x?10x?35x?50x?24
10.?x?y?z?2xy?2xz?2yz
44422222243243x?y11.?3,,,b?a 3y
7