3 |
x |
x-1 |
x |
x+1 |
2x |
1-x |
A.
| B.
| C.
| D.
|
x(x+1)-x(x-1) |
(x-1)(x+1) |
x-1 |
2x |
2x |
(x-1)(x+1) |
x-1 |
2x |
1 |
x+1 |
3 |
1 | ||
|
| ||||
(
|
1-
| ||
2 |
1 |
a |
1 |
b |
a-3ab+b |
2a+2b-7ab |
1 |
x-1 |
x2-2x+1 |
x+1 |
1 |
x |
1 |
y |
y-x |
3x2 |
x2 |
x-1 |
2x |
1-x |
x |
x-1 |
x2-4x+4 |
x2-4 |
x |
x+2 |
x-1 |
x+2 |
1 |
x |
x2-2x+1 |
x2-1 |
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