-a |
b |
2a2 |
5b |
a |
5b |
16-a2 |
a2+8a+16 |
a-4 |
2a+8 |
a-2 |
a+2 |
1 |
x-2 |
1-x |
2-x |
2 |
x+3 |
3 |
2 |
7 |
2x+6 |
a2 |
b2 |
4a4 |
25b2 |
a |
5b |
a2 |
b2 |
25b2 |
4a4 |
a |
5b |
5 |
4ab |
(a+4)(a-4) |
(a+4)2 |
2(a+4) |
a-4 |
a-2 |
a+2 |
2a-4 |
a+2 |
2ax+3 |
a-x |
3 |
4 |
x |
x+1 |
m+1 |
x2+x |
x+1 |
x |
A.-1或-2 | B.-1或2 | C.1或2 | D.0或-2 |
A.
| B.
| ||||
C.
| D.
|
y+1 |
y-1 |
4 |
y2-1 |
2x |
x-2 |
3-m |
2-x |
5 |
x-1 |
3 |
x+1 |
10 |
x2-1 |
2 |
1-x |
3 |
x-1 |
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