a2-1 |
a2-2a+1 |
2a-a2 |
a2-a-2 |
A.-
| B.-
| C.1 | D.-
|
a2-1 |
a2-2a+1 |
2a-a2 |
a2-a-2 |
(a+1)(a-1) |
(a-1)2 |
-a(a-2) |
(a-2)(a+1) |
(a+1)2-a(a-1) |
(a+1)(a-1) |
3a+1 |
a2-1 |
5 |
3 |
x |
x2-x+1 |
1 |
x |
A.
| B.
| C.6 | D.8 |
-2ac2 |
14a2bc |
1 |
x-2 |
1 |
x+2 |
1 |
a |
1 |
b |
x2-5 |
x-2 |
x |
x-2 |
1+x |
2-x |
1 |
a-1 |
2 |
1-a2 |
a-1 |
a2-1 |
a |
a+1 |
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