题目内容
(1)
-
+
(2)
+(1+
)(1-
).
| 27 |
|
| 12 |
(2)
| ||||
|
| 3 |
| 3 |
(1)原式=3
-
+2
=
;
(2)原式=
+1-(
)2
=
+1-3
=2+1-3
=0.
| 3 |
| ||
| 3 |
| 3 |
2
| ||
| 3 |
(2)原式=
6
| ||||
|
| 3 |
=
2
| ||
|
=2+1-3
=0.
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题目内容
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2
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6
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2
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