题目内容
化简:
(1)(2
-
)2;
(2)(
+2)(
-2);
(3)
;
(4)
+
-
+
.
(1)(2
| 3 |
| 2 |
(2)(
| 3 |
| 3 |
(3)
| ||||
|
(4)
| 8 |
| 32 |
| 2 |
|
(1)原式=(2
)2+(
)2-2×2
×
=12+2-4
=14-4
;
(2)原式=(
)2-22=3-4=-1;
(3)原式=
=
=1;
(4)原式=2
+4
-
+
=
.
| 3 |
| 2 |
| 3 |
| 2 |
| 6 |
| 6 |
(2)原式=(
| 3 |
(3)原式=
3
| ||||
|
| ||
|
(4)原式=2
| 2 |
| 2 |
| 2 |
| ||
| 2 |
| 11 |
| 2 |
| 2 |
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