题目内容
(1)求式子中x的值:x2=
(2)计算
+
+
(3)化简:|
|-|1-
|+|-
|.
| 4 |
| 81 |
(2)计算
| 4 |
| 32 |
| 3 | -8 |
(3)化简:|
| 3-1 |
| 3 |
| 3 |
(1)x=±
=±
;
(2)原式=2+3-2=3;
(3)原式=
-(
-1)+
=
-
+1+
=
+1.
|
| 2 |
| 9 |
(2)原式=2+3-2=3;
(3)原式=
| 2 |
| 3 |
| 3 |
=
| 2 |
| 3 |
| 3 |
=
| 2 |
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