a |
a-2 |
a |
a+2 |
a |
2-a |
a(a+2) |
(a+2)(a-2) |
a(a-2) |
(a+2)(a-2) |
a |
2-a |
a(a+2)-a(a-2) |
(a-2)(a+2) |
2-a |
a |
4a |
(a+2)(a-2) |
-(a-2) |
a |
4 |
a+2 |
a-1 |
a |
a2+2a |
a2-1 |
x2-16 |
x2+8x+16 |
x |
x-4 |
1 |
x2-16 |
2 |
a+1 |
a-1 |
a2+a |
a2-1 |
A.(
| B.(-0.1)-2=100 | ||||||||
C.
| D.
|
x2-5x+6 |
x-3 |
A.1 | B.-5 | C.1或-5 | D.0 |
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