题目内容
化简与求值:
(1)(
-
)-(
+
);
(2)
-6
+3x
,并将自己所喜欢的x值代入化简结果进行计算.
(1)(
| 24 |
|
|
| 6 |
(2)
| 5 |
| 2 |
| 4x |
|
|
(1)原式=2
-
-
-
=
-
;
(2)原式=5
-2
+3
=6
,
取x的值为1,则6
=6.
| 6 |
| ||
| 2 |
| ||
| 4 |
| 6 |
=
| 6 |
3
| ||
| 4 |
(2)原式=5
| x |
| x |
| x |
=6
| x |
取x的值为1,则6
| x |
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