2 |
a2-1 |
1 |
a+1 |
2 |
a2-1 |
1 |
a+1 |
2 |
(a+1)(a-1) |
1 |
a+1 |
2 |
(a+1)(a-1) |
a-1 |
(a+1)(a-1) |
2+a-1 |
(a+1)(a-1) |
a+1 |
(a+1)(a-1) |
1 |
a-1 |
m+2n |
n-m |
n |
m-n |
2m |
n-m |
2 |
3 |
3 |
4 |
2 |
3 |
4 |
5 |
2 |
3 |
3 |
4 |
3 |
2 |
4 |
5 |
2 |
3 |
3 |
4 |
2 |
3 |
4 |
5 |
b |
a |
b+m |
a+m |
b |
a |
b+m |
a+m |
a+1 |
a-1 |
A.
| B.
| C.
| D.1 |
x |
x-2 |
2 |
2-x |
x2 |
1+x2 |
12 |
1+12 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
(
| ||
1+(
|
1 |
5 |
1 |
2 |
1 |
3 |
1 |
n |
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