x |
y |
3 |
4 |
x+y |
y |
x+2y |
2x-y |
x |
y |
3 |
4 |
3 |
4 |
x+y |
y |
| ||
y |
7 |
4 |
x+2y |
2x-y |
| ||
2×
|
11 |
2 |
7 |
4 |
11 |
2 |
a+b-c |
c |
a-b+c |
b |
-a+b+c |
a |
(a+b)(b+c)(c+a) |
abc |
A.8 | B.4 | C.2 | D.1 |
a+2b-3c |
2 |
b-2c+3c |
3 |
c+3a+2b |
4 |
a-2b+3c |
a+3b-2c |
a |
b |
7 |
5 |
b |
c |
3 |
2 |
a-b |
b+c |
a |
b |
b |
c |
c |
a |
3a+2b+c |
a-2c-3c |
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