题目内容
(1)
×
+
(2)(
-
)(
+
)+2
(3)
-1
(4)2
+
-2
.
| 2 |
| 3 |
| 24 |
(2)(
| 5 |
| 7 |
| 5 |
| 7 |
(3)
| ||||
|
(4)2
| 3 |
| 27 |
|
(1)原式=
+2
=3
;
(2)原式=(
)2-(
)2+2=5-7+2=0;
(3)原式=
-1=
-1=1-1=0;
(4)原式=2
+3
-
=
.
| 6 |
| 6 |
| 6 |
(2)原式=(
| 5 |
| 7 |
(3)原式=
2
| ||||
|
| ||
|
(4)原式=2
| 3 |
| 3 |
2
| ||
| 3 |
13
| ||
| 3 |
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