5x |
3x2-2 |
1 |
2 |
a2-b2 |
3a-6b |
5 |
6 |
1 |
6 |
1 |
2 |
5x |
3x2-2 |
5×
| ||
3×(
|
| ||
-
|
5 |
2 |
8 |
13 |
20 |
13 |
5 |
6 |
1 |
6 |
5 |
6 |
1 |
6 |
5 |
6 |
1 |
6 |
2 |
3 |
5 |
6 |
2 |
6 |
1 |
2 |
a2-b2 |
3a-6b |
(a+b)(a-b) |
3(a-2b) |
| ||
3×
|
4 |
9 |
2x+y |
x-3y |
x+1 |
2x-1 |
4 |
a |
2x-3y |
5 |
1 |
3 |
x+y |
x-y |
2 |
x |
A.1个 | B.2个 | C.3个 | D.4个 |
2x+8 |
5x-2 |
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