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.若a2−b2＝
，a−b＝
，则a+b的值为（ ）
，a−b＝，则a+b的值为（ ） | A: − |
| B: |
| C: 1 |
| D: 2 |
一次做对，真牛！
+5奖励规则>
- 提示1：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
- 答案：Qg==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.计算（x-y）（-y-x）的结果是（ ）
| A: -x2-y2 |
| B: -x2+y2 |
| C: x2+y2 |
| D: x2-y2 |
一次做对，真牛！
+5奖励规则>
- 提示1：IC155piv55u45ZCM55qE6aG577yM5LqS5Li655u45Y+N6aG55piveOS4ji1477yM5qC55o2u5bmz5pa55beu5YWs5byP5Y2z5Y+v6Kej562ULg==
- 答案：Qg==
6Kej77ya77yIeC1577yJ77yILXkteO+8iT15PHN1cD4yPC9zdXA+LXg8c3VwPjI8L3N1cD4uIDxicj7mlYXpgIlCLiA=
本课配套习题挑战模式3/5
单选题
难度系数：
3.下列多项式相乘，不能运用公式“（a+b）（a-b）=a2-b2”计算的是（ ）
| A: （2x-y）（2x+y） |
| B: （-2x-y）（-2x+y） |
| C: （-2x-y）（2x+y） |
| D: （-2x+y）（2x+y） |
一次做对，真牛！
+5奖励规则>
- 提示1：IOeUsemimOaEj+WPr+efpe+8jOmimOebruS4reeahOWFrOW8j+S4uuW5s+aWueW3ruWFrOW8j++8jOagueaNruW5s+aWueW3ruWFrOW8j+eahOWumuS5iei/m+ihjOino+etlOWNs+WPry4=
- 答案：Qw==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.计算20092-2008×2010+（-1）2009的结果是（ ）
| A: 0 |
| B: 1 |
| C: -1 |
| D: 3 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOmmluWFiOaKijIwMDjDlzIwMTDmlbTnkIbkuLrvvIgyMDA5LTHvvInvvIgyMDA5KzHvvInnmoTlvaLlvI/vvIzov5DnlKjlubPmlrnlt67lhazlvI/ov5vooYzorqHnrpfvvIznhLblkI7lho3miormiYDlvpfnu5PmnpzlkIjlubbljbPlj68u
- 答案：QQ==
6Kej77yaMjAwOTxzdXA+Mjwvc3VwPi0yMDA4w5cyMDEwK++8iC0x77yJPHN1cD4yMDA5PC9zdXA+PGJyPj0yMDA5PHN1cD4yPC9zdXA+Le+8iDIwMDktMe+8icOX77yIMjAwOSsx77yJK++8iC0x77yJPGJyPj0yMDA5PHN1cD4yPC9zdXA+LTIwMDk8c3VwPjI8L3N1cD4rMSvvvIgtMe+8iTxicj49MC4gPGJyPuaVhemAiUEuIA==
本课配套习题挑战模式5/5
单选题
难度系数：
5.化简（3+1）（32+1）（34+1）（38+1）得（ ）
| A:（38+1）2 |
| B:（38-1）2 |
| C: 316-1 |
D:  (316−1) |
一次做对，真牛！
+5奖励规则>
- 提示1：IOagueaNruW5s+aWueW3ruWFrOW8j++8jOWwhjxpbWcgd2lkdGg9NjkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvRkYvRkIvckJBQ0ZGTnNMNktBdWs3LUFBQUJxNXZnQmRBMjg0LnBuZyI+5LiO77yIMysx77yJ77yIMzxzdXA+Mjwvc3VwPisx77yJ77yIMzxzdXA+NDwvc3VwPisx77yJ77yIMzxzdXA+ODwvc3VwPisx77yJ55u45LmY5ZCO6L+b6KGM5YyW566A77yM5Y2z5Y+v5rGC5Ye6562U5qGILg==
- 答案：RA==
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
