题目内容
求下列各式中x的值:
(1)(x+
)2-(x-
)(x+
)=
(2)(x-1)3=(-1)2009.
(1)(x+
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
(2)(x-1)3=(-1)2009.
(1)(x2+
x+
)-(x2-
)=
由原方程,得
x2+
x+
-x2+
=
解得x=
;
(2)由原方程,得
x-1=
,
解得x=0.
| 1 |
| 2 |
| 1 |
| 16 |
| 1 |
| 16 |
| 1 |
| 4 |
由原方程,得
x2+
| 1 |
| 2 |
| 1 |
| 16 |
| 1 |
| 16 |
| 1 |
| 4 |
解得x=
| 1 |
| 2 |
(2)由原方程,得
x-1=
| 3 | -1 |
解得x=0.
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