x |
x-y |
y2 |
x+y |
x2 |
x+y |
1 | ||
2+
|
| ||
a2-a |
|
|
x-(x-y) |
x-y |
x+y |
y2 |
x2+xy-x2 |
x+y |
x |
x-y |
-2 |
-2-(-1) |
1 | ||
2+
|
3 |
| ||
a2-a |
-(a-1) |
a(a-1) |
1 |
a |
3 |
|
|
| ||
|y| |
| ||
|x| |
x+y |
xy |
xy |
5
| ||
3 |
x |
x+2 |
3 |
2 |
b2 |
1-b |
1+b |
1-b |
x+2 |
x-2 |
4 |
x2-4x+4 |
x |
x-2 |
6 |
m2-9 |
2 |
m-3 |
m |
m+3 |
x |
x-2 |
x |
x+2 |
4x |
2-x |
A.
| B.-
| C.-1 | D.1 |
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