1 |
a |
1 |
b |
1 |
a+b |
b |
a |
a |
b |
A.-3 | B.-2 | C.-1 | D.0 |
1 |
a |
1 |
b |
a+b |
ab |
1 |
a+b |
1 |
a |
1 |
b |
m2 |
m-2 |
A.
| B.
| C.
| D.4 |
6 |
a2-9 |
1 |
a+3 |
1 |
3-a |
A.相等 | B.互为倒数 | C.互为相反数 | D.M>N |
x-18 |
x2-4 |
4 |
2-x |
x-18 |
(x-2)(x+2) |
4 |
x-2 |
x-18 |
(x-2)(x+2) |
4(x+2) |
(x-2)(x+2) |
2 |
x+3 |
2 |
3-x |
2x-18 |
x2-9 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
4 |
1 |
5 |
1 |
x(x+1) |
1 |
(x+1)(x+2) |
1 |
(x+2)(x+3) |
1 |
(x+3)(x+4) |
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