题目内容
已知a+
=
，则a2+
=______．
| 1 |
| a |
| 3 |
| 2 |
| 1 |
| a2 |
∵a+
=
，
∴（a+
）2=
，即a2+
+2=
∴a2+
=
-2=
．
故答案是：
．
| 1 |
| a |
| 3 |
| 2 |
∴（a+
| 1 |
| a |
| 9 |
| 4 |
| 1 |
| a2 |
| 9 |
| 4 |
∴a2+
| 1 |
| a2 |
| 9 |
| 4 |
| 1 |
| 4 |
故答案是：
| 1 |
| 4 |
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题目内容
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| a |
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| 1 |
| a2 |
| 1 |
| a |
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| 1 |
| a |
| 9 |
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| a2 |
| 9 |
| 4 |
| 1 |
| a2 |
| 9 |
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| 1 |
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