x2-4 |
2x-4 |
x-3 |
x-1 |
m |
x-1 |
x6 |
x2 |
x+m |
x+n |
m |
n |
-a+b |
c |
a+b |
c |
1 |
a |
1 |
b |
a+b |
ab |
200 |
x+50 |
2000 |
x |
2000 |
x |
2000 |
x+50 |
2000 |
x |
2000 |
x-50 |
2000 |
x-50 |
2000 |
x |
a+b |
ab |
( ) |
a2b |
(x+y)2 |
xy |
(x-y)2 |
xy |
1 |
3 |
1 |
3 |
2 |
a |
5 |
a2 |
10 |
a3 |
17 |
a4 |
26 |
a5 |
1 |
2 |
3 |
x-2 |
1 |
x |
x |
2x-3 |
3 |
3-2x |
x2-1 |
x2+4x+4 |
x+2 |
x+1 |
4 |
5 |