A.
| B.
| ||||||||
C.
| D.
|
x(x+1) |
(x+1)(1-x) |
x |
x-1 |
x-10y |
10x+2y |
(a-b)2 |
a-b |
x-0.02x2 |
0.2a+3b |
A.
| B.
| ||||
C.
| D.
|
2x |
3y |
( ) |
6xy |
6xy |
( ) |
100x2y2 |
( ) |
1 |
a-4 |
( ) |
a2-16 |
2a2-2ab |
a-b |
2a |
( ) |
2x2+2xy |
x+y |
2x |
( ) |
( ) |
m+1 |
-2x |
1-2x |
( ) |
2x2-x |
a2-3ab+b2 |
ab |
( ) |
ab |
3y |
x-y |
-1 |
1-x |
2(x+y) |
3(x+y) |
2 |
3 |
a-b |
a+b |
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