本课配套习题挑战模式1/5
单选题
难度系数:
1.计算(x-2)·(x+3)的结果是( )
A: x2-x-6 |
B: x2-x+6 |
C: x2+x-6 |
D: x2+x+6 |
一次做对,真牛!
+5奖励规则>
- 提示1:5aSa6aG55byP5LmY5aSa6aG55byP77yM55So5LiA5Liq5aSa6aG55byP5q+P5LiA6aG55YiG5Yir5LmY5Lul5Y+m5LiA5Liq5aSa6aG55byP55qE5q+P5LiA6aG577yM5oqK5b6X5Yiw55qE5LmY56ev55u45Yqg
- 答案:Qw==
6Kej562U77ya4oi1KHgtMinCtyh4KzMpPTxpbWcgd2lkdGg9MTg1IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzNFL0E2L3JCQUNKbFRJbEZ1QmdvM19BQUFDYmZtWGlkNDk2OS5wbmciPjxicj7mlYXpgIlD
本课配套习题挑战模式2/5
单选题
难度系数:
2.若(x+2)(x-4)=x2+mx+n,则m、n的值分别为()
A: 2,8 |
B: 2,-8 |
C: -2,-8 |
D: -2,8 |
一次做对,真牛!
+5奖励规则>
- 提示1:5aSa6aG55byP5LmY5aSa6aG55byP77yM55So5LiA5Liq5aSa6aG55byP5q+P5LiA6aG55YiG5Yir5LmY5Lul5Y+m5LiA5Liq5aSa6aG55byP55qE5q+P5LiA6aG577yM5oqK5b6X5Yiw55qE5LmY56ev55u45Yqg
- 答案:Qw==
6Kej562U77ya4oi1KHgrMikoeC00KT08aW1nIHdpZHRoPTE1IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzNFL0E2L3JCQUNKbFRJbEY2aHc2a2FBQUFCT1ZicjRiSTk4NS5wbmciPi00eCsyeC04PTxpbWcgd2lkdGg9ODYgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvRTUvckJBQ0oxVElsRjdEQ3pCaEFBQUJ6OEtaWkdJNDk5LnBuZyI+eDxzdXA+Mjwvc3VwPitteCtuPGJyPuKItG09PGltZyB3aWR0aD02OCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC83My8xQS9yQkFDRTFUSWxGNlRJbTk4QUFBQmtXeUNKeWszNTkucG5nIj48YnI+5pWF6YCJQw==
本课配套习题挑战模式3/5
单选题
难度系数:
3.若(x+a)(x-2)的结果中不含x的一次项,则a的值等于()
A: 0 |
B: 1 |
C: 2 |
D: |
一次做对,真牛!
+5奖励规则>
- 提示1:5aSa6aG55byP5LmY5aSa6aG55byP77yM55So5LiA5Liq5aSa6aG55byP5q+P5LiA6aG55YiG5Yir5LmY5Lul5Y+m5LiA5Liq5aSa6aG55byP55qE5q+P5LiA6aG577yM5oqK5b6X5Yiw55qE5LmY56ev55u45Yqg
- 答案:Qw==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.如图所示,阴影部分面积为 ( )
A: ac+bc |
B: ac+(b-c) |
C: a·c+(b-c)·c |
D: a+b+2c(a-c)+(b-c) |
一次做对,真牛!
+5奖励规则>
- 提示1:6ZW/5pa55b2i55qE6Z2i56ev562J5LqO6ZW/5oiQ5a69
- 提示2:5bmz56e75rOV5rGC6Zi05b2x6YOo5YiG55qE6Z2i56ev
- 答案:Qw==
6Kej562U77ya6Zi05b2x6YOo5YiG55qE6Z2i56ev562J5LqOYWMrYmM8aW1nIHdpZHRoPTI0IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzczLzFBL3JCQUNFMVRJbEdtajFqeE9BQUFCTlNqM1pTbzE4MC5wbmciPjxicj7mlYXpgIlD