题目内容
(1)3
×(
-5
-2
)
(2)(3
+5
)(3
-5
)
(3)(
)2
| 8 |
| 54 |
| 2 |
| 6 |
(2)(3
| 2 |
| 3 |
| 2 |
| 3 |
(3)(
-1+
| ||
| 2 |
(1)原式=6
×(3
-5
-2
)=18
-60-12
,
=6
-60,
=12
-60;
(2)原式=(3
)2-(5
)2,
=18-75,
=-57;
(3)(
)2=
=
.
| 2 |
| 6 |
| 2 |
| 6 |
| 12 |
| 12 |
=6
| 12 |
=12
| 3 |
(2)原式=(3
| 2 |
| 3 |
=18-75,
=-57;
(3)(
-1+
| ||
| 2 |
4-2
| ||
| 4 |
2-
| ||
| 2 |
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