计算和解方程:
(1)(-
)2+(
)-1×(π-3.14)0-
÷
(2)
-(3
-2
)(3
+2
)
(3)
+
=2
(4)
+
=
.
(1)(-
| 2 |
| 1 |
| 3 |
| 12 |
| 3 |
(2)
| ||
|
| 2 |
| 3 |
| 2 |
| 3 |
(3)
| 10x |
| 2x-1 |
| 5 |
| 1-2x |
(4)
| 2 |
| x2+x |
| 3 |
| x2-x |
| 4 |
| x2-1 |
| 2 |
| 1 |
| 3 |
| 12 |
| 3 |
| ||
|
| 2 |
| 3 |
| 2 |
| 3 |
| 10x |
| 2x-1 |
| 5 |
| 1-2x |
| 2 |
| x2+x |
| 3 |
| x2-x |
| 4 |
| x2-1 |