| ||||
|
5x-10y |
2x+5y |
| ||||
|
0.3a+0.5b |
0.2a-b |
| ||||
|
6(
| ||||
6(
|
6×
| ||||
6×
|
3x+4y |
3x-4y |
0.3a+0.5b |
0.2a-b |
10(0.3a+0.5b) |
10(0.2a-b) |
10×0.3a+10×0.5b |
10×0.2a-10b |
3a+5b |
2a-10b |
1 |
a |
1 |
b |
5 |
a |
b(a-b) |
b |
a(a-b) |
c |
a2b4 |
a2 |
bc3 |
1 |
x2-4 |
x |
4-2x |
4a |
5b2c |
5b |
-2ac2 |
x-1 |
x2-2x+1 |
1 |
1-x |
b |
a |
b2 |
( ) |
a-b |
a+b |
( ) |
a2-b2 |
x |
x2+2x |
x |
x( ) |
1 |
( ) |
2-x |
-x2+5 |
( ) |
x2-5 |
2x2+2xy |
x+y |
2x |
( ) |
x2+2xy+y2 |
x2-y2 |
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