2x |
x+y |
4x |
y-x |
8x |
x2-y2 |
A.
| B.-
| C.-
| D.
|
2x |
x+y |
(x+y)(x-y) |
8x |
4x |
x-y |
(x+y)(x-y) |
8x |
x-y |
4 |
x+y |
2 |
x-y+2x+2y |
4 |
3x+y |
4 |
a-1 |
a+2 |
a2-4 |
a2-2a+1 |
1 |
a2-1 |
x2-y2 |
x |
2xy-y2 |
x |
1 | ||
2+
|
27 |
|
3 |
a-1 |
a |
2a-1 |
a |
x2-2x |
x |
4 |
x |
a+1 |
a-1 |
a |
a2-2a+1 |
1 |
a |
2 |
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