x+3 |
x+2 |
1 | ||||
|
x-3 |
2x-4 |
5 |
x-2 |
x+3 |
x+2 |
1 | ||||
|
3 |
2 |
3 |
2 |
-3
| ||||
|
-1 | ||||
|
x-3 |
2(x-2) |
5-(x2-4) |
x-2 |
x-3 |
2(x-2) |
x-2 |
(3+x)(3-x) |
1 |
2(x+3) |
| ||
2 |
| ||
2 |
1 |
(x+1)(x+2) |
1 |
(x+2)(x+3) |
1 |
(x+3)(x+4) |
1 |
(x+4)(x+5) |
A.
| B.
| C.
| D.
|
1 |
1-a |
1 |
1+a |
2 |
1+a2 |
4 |
1+a4 |
8 |
1+a8 |
16 |
1+a16 |
1 |
b2+c2-a2 |
1 |
c2+a2-b2 |
1 |
a2+b2-c2 |
A.正数 | B.负数 | C.零 | D.不能确定 |
x2-4 |
x2-4x+4 |
x2-x |
x-1 |
3 |
2 |
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