x2 |
x2-1 |
1-2x |
x-1 |
x2 |
(x+1)(x-1) |
1-2x |
x-1 |
(x-1)2 |
x-1 |
x2 |
(x+1)(x-1) |
1-2x-(x2-2x+1) |
x-1 |
x2 |
(x+1)(x-1) |
x-1 |
-x2 |
1 |
x+1 |
1 |
-7+1 |
1 |
6 |
a2-1 |
a2-2a+1 |
2a-a2 |
a-2 |
3 |
y1 |
3 |
y2 |
3 |
y3 |
3 |
y2007 |
1 |
m-1 |
m |
m2-1 |
a2+3a |
a2+3a+2 |
a+3 |
a+1 |
2 |
a+2 |
3 |
x2 |
x2-1 |
1-2x |
x-1 |
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