2 |
x2-1 |
1 |
x+1 |
1 |
1-x |
1 |
x+1 |
1 |
x-1 |
x-1 |
(x+1)(x-1) |
x+1 |
(x+1)(x-1) |
(x-1)-(x+1) |
(x+1)(x-1) |
-2 |
x2-1 |
x |
1+x |
3 |
1+3 |
1 |
2 |
| ||
1+
|
1 |
3 |
1 |
100 |
1 |
99 |
1 |
3 |
1 |
2 |
1 |
x-1 |
x |
x-1 |
A.1 | B.2 | C.-1 | D.-2 |
b2 |
2a-b |
4a2 |
b-2a |
A.-2a-b | B.b-2a | C.2a-b | D.b+2a |
b2 |
a-b |
a2 |
a-1 |
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