题目内容
化简与计算:
(1)
+2x
-x2
(2)
+
-6
(1)
| 1 |
| 2 |
| 32x3 |
|
|
(2)
| 1 | ||
2+
|
| 27 |
|
(1)原式=
×4x
+2x•
-x2•
=2x
+x
-5x
=-2x
;
(2)原式=2-
+3
-2
=2.
| 1 |
| 2 |
| 2x |
| ||
| 2 |
5
| ||
| x |
| 2x |
| 2x |
| 2x |
| 2x |
(2)原式=2-
| 3 |
| 3 |
| 3 |
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