a |
a-1 |
1 |
a2-2a+1 |
2 |
1 |
a-1 |
2 |
2 |
2 |
1 |
a |
1 |
b |
A.
| B.-
| C.1 | D.-1 |
1 |
x |
x2-1 |
x |
a2 |
a-1 |
x2+2x+1 |
x2+x |
1+x2 |
x |
2 |
2 |
3 |
2 |
3 |
3 |
8 |
3 |
8 |
4 |
15 |
4 |
15 |
a |
b |
a |
b |
a2+2ab+b2 |
a-b |
a+b |
a-b |
2a+5 |
2(a+1) |
a-1 |
2(a+1) |
2a-3 |
2(a+1) |
a2b |
-c2 |
-a3 |
c |
a2+5a+4 |
a2+a-6 |
a2-6a+8 |
a2-16 |
2x-6 |
x-2 |
5 |
x-2 |
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