1 |
x-1 |
1 |
x+1 |
2 |
1-x |
| ||||
|
| ||
|
(x+1)-(x-1) |
(x-1)(x+1) |
1-x |
2 |
2 |
(x-1)(x+1) |
x-1 |
2 |
1 |
x+1 |
| ||||||
3-2 |
(
| ||
3-1 |
6 |
3 |
6 |
3 |
x2 |
x-2 |
4 |
x-2 |
1 |
x2+2x |
1 |
4 |
1 |
x |
1 |
y |
(x-y)2+4xy |
xy |
5 |
5 |
1 | ||
|
x-1 |
x |
1 |
x |
1 |
1+a2 |
1 |
1+b2 |
A.
| B.1 | C.2 | D.4 |
a |
a+1 |
a2-2a |
a2-4 |
a+1 |
a23a+2 |
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