中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.下列式子中，是完全平方的展开式的是 ( )
| A: a2+ab+b2 |
| B: a2+2a+2 |
| C: a2-2b+b2 |
| D: a2+2a+1 |
一次做对，真牛！
+5奖励规则>
- 提示1：PGltZyB3aWR0aD0xOTkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMUIvckJBQ0UxVElsZjNBWktCNkFBQUV0WWNYNE40NTQ4LnBuZyI+YTxzdXA+Mjwvc3VwPjxpbWcgd2lkdGg9MTYgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQUEvMjMvckJBQ0ZGVElsZjJqcGlST0FBQUExMlU3c3RZMjAyLnBuZyI+MmFiK2I8c3VwPjI8L3N1cD4g
- 答案：RA==
6Kej562U77ya4oi1YTxzdXA+Mjwvc3VwPisyYSsxPTxpbWcgd2lkdGg9NzcgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvQTcvckJBQ0psVElsZjN6ZTZBVUFBQUNITU9iZjljNTA0LnBuZyI+PGJyPuaVhemAiUQ=
本课配套习题挑战模式2/5
单选题
难度系数：
2.下列运算正确的是( )
| A: a2·a4=a8 |
| B: (x-2)(x+3)=x2-6 |
| C: (x-2)2=x2-4 |
| D: 2a+3a=5a |
一次做对，真牛！
+5奖励规则>
- 提示1：5ZCM5bqV5bmC55u45LmY77yM5bqV5pWw5LiN5Y+Y77yM5oyH5pWw55u45Yqg
- 提示2：PGltZyB3aWR0aD0xOTkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMUIvckJBQ0UxVElsZjNBWktCNkFBQUV0WWNYNE40NTQ4LnBuZyI+YTxzdXA+Mjwvc3VwPjxpbWcgd2lkdGg9MTYgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQUEvMjMvckJBQ0ZGVElsZjJqcGlST0FBQUExMlU3c3RZMjAyLnBuZyI+MmFiK2I8c3VwPjI8L3N1cD4g
- 答案：RA==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.运用完全平方公式计算89.82的最佳方法是( )
| A: (89+0.8)2 |
| B: (80+9.8)2 |
| C: (90-0.2)2 |
| D: (100-10.2)2 |
一次做对，真牛！
+5奖励规则>
- 提示1：PGltZyB3aWR0aD0xOTkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMUIvckJBQ0UxVElsZjNBWktCNkFBQUV0WWNYNE40NTQ4LnBuZyI+YTxzdXA+Mjwvc3VwPjxpbWcgd2lkdGg9MTYgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQUEvMjMvckJBQ0ZGVElsZjJqcGlST0FBQUExMlU3c3RZMjAyLnBuZyI+MmFiK2I8c3VwPjI8L3N1cD4g
- 提示2：5a6M5YWo5bmz5pa55YWs5byP55qE566A5L6/6L+Q55So
- 答案：Qw==
6Kej562U77ya4oi1PGltZyB3aWR0aD0zMiBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC83My8xQi9yQkFDRTFUSWxneWpFMnJnQUFBQmZoU0Z3SlkzNzYucG5nIj49PGltZyB3aWR0aD02OSBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9BQS8yMy9yQkFDRkZUSWxnM3hjT09yQUFBQjZudVQ5aXM1MDcucG5nIj48YnI+5pWF6YCJQw==
本课配套习题挑战模式4/5
单选题
难度系数：
4.若x2+2ax+16是一个完全平方的展开式，则a的值为 ( )
| A: 8 |
| B: 4 |
| C: ±4 |
| D: ±8 |
一次做对，真牛！
+5奖励规则>
- 提示1：PGltZyB3aWR0aD0xOTkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMUIvckJBQ0UxVElsZjNBWktCNkFBQUV0WWNYNE40NTQ4LnBuZyI+YTxzdXA+Mjwvc3VwPjxpbWcgd2lkdGg9MTYgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQUEvMjMvckJBQ0ZGVElsZjJqcGlST0FBQUExMlU3c3RZMjAyLnBuZyI+MmFiK2I8c3VwPjI8L3N1cD4g
- 提示2：5a6M5YWo5bmz5pa55YWs5byP6YCG5bqU55So
- 答案：Qw==
6Kej562U77ya4oi1eDxzdXA+Mjwvc3VwPisyYXgrMTY9PGltZyB3aWR0aD02NyBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zRS9FNi9yQkFDSjFUSWxnbXpnX1M0QUFBQ0pFNXFOM3M0MjYucG5nIj48YnI+4oi0MmE9PGltZyB3aWR0aD0yNCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9BQS8yMy9yQkFDRkZUSWxnbmpGTUh2QUFBQlRTMzBobWczNjQucG5nIj48YnI+4oi0YT08aW1nIHdpZHRoPTI0IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzczLzFCL3JCQUNFMVRJbGduUS1nbXNBQUFCUTEwUWJ5MDA3Ny5wbmciPjxicj7mlYXpgIlD
本课配套习题挑战模式5/5
单选题
难度系数：
5.若使x2-6x+m成为形如(x-a)2的完全平方式，则m、a的值为( )
| A: m=9，a=9 |
| B:m=9，a=3 |
| C: m=3，a=3 |
| D: m=-3，a=-2 |
一次做对，真牛！
+5奖励规则>
- 提示1：PGltZyB3aWR0aD0xOTkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMUIvckJBQ0UxVElsZjNBWktCNkFBQUV0WWNYNE40NTQ4LnBuZyI+YTxzdXA+Mjwvc3VwPjxpbWcgd2lkdGg9MTYgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQUEvMjMvckJBQ0ZGVElsZjJqcGlST0FBQUExMlU3c3RZMjAyLnBuZyI+MmFiK2I8c3VwPjI8L3N1cD4g
- 答案：Qg==
6Kej562U77ya4oi1eDxzdXA+Mjwvc3VwPi02eCs5PTxpbWcgd2lkdGg9NjcgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMUIvckJBQ0UxVElsZ1dRZkJnckFBQUNBc29BTExzOTI4LnBuZyI+PGJyPuKItG09OSxhPTM8YnI+5pWF6YCJQg==
