x |
x-2 |
x |
x+2 |
4x |
2-x |
A.
| B.-
| C.-1 | D.1 |
x(x+2)-x(x-2) |
(x-2)(x+2) |
4x |
2-x |
4x |
(x-2)(x+2) |
2-x |
4x |
1 |
x+2 |
3x2-xy |
9x2-6xy+y2 |
4 |
3 |
2 |
3 |
x2 |
x2-y2 |
y2 |
y-x |
4 |
2-a |
a2-b2 |
a2b+ab2 |
a2-2ab+b2 |
ab |
1 |
(b-a)2 |
x+2 |
x-2 |
4 |
x2-4x+4 |
x |
x-2 |
4 |
2-x |
x |
x+1 |
1 |
x2-1 |
3 |
a-2 |
a2-4 |
1 |
a+2 |
1 |
a+2 |
a2-1 |
a+2 |
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