题目内容
计算:
(1)
(2)-2-2+
+
-3-1+(π-3.14)0.
(1)
| x-2y-3(-2x-3y-1)-2 |
| 2-1x2y-3 |
(2)-2-2+
| 2 |
| 5 |
| 1 |
| 2 |
(1)原式=
=
=
x2y2;
(2)原式=-
+
+
-
+1
=
.
| x-2y-3•(-2)-2x6y2 |
| 2-1x2y-3 |
=
| x4y-1•(-2)-2 |
| 2-1x2y-3 |
=
| 1 |
| 2 |
(2)原式=-
| 1 |
| 4 |
| 2 |
| 5 |
| 1 |
| 2 |
| 1 |
| 3 |
=
| 41 |
| 60 |
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