x2-1 |
x2-2x+1 |
x+1 |
x-1 |
1 |
1+x |
2 |
(x+1)(x-1) |
(x-1)2 |
x-1 |
x+1 |
1 |
x+1 |
1 |
x+1 |
x |
1+x |
2 |
| ||
|
2-
| ||
2 |
2a+6 |
a2-4a+4 |
a-2 |
a+3 |
1 |
a-2 |
1 |
1×3 |
1 |
2×4 |
1 |
3×5 |
1 |
98×100 |
1 |
99×101 |
A.1 | B.2 | C.3 | D.4 |
3x |
x+2 |
x |
x-2 |
x |
x2-4 |
16 |
1 |
3 |
x2 |
x+1 |
1 |
x+1 |
x2 |
x2-x |
x2-4x |
x+3 |
4-x |
x+3 |
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