5 |
12 |
|
x-y |
x+3y |
x2-y2 |
x2+6xy+9y2 |
3y |
x+y |
1 |
2 |
5 |
12 |
3 |
3 |
|
|
x-y |
x+3y |
x2-y2 |
x2+6xy+9y2 |
3y |
x+y |
x-y |
x+3y |
(x+3y)2 |
(x+y)(x-y) |
3y |
x+y |
x+3y |
x+y |
3y |
x+y |
x |
x+y |
1 |
2 |
-
| ||
-
|
1 |
3 |
x2-2x+1 |
x2-1 |
2x-2 |
x+1 |
1 |
a |
1 |
b |
1 |
3 |
ab |
a-b |
A.-3 | B.-
| C.3 | D.
|
3 |
a+1 |
a2-4a+4 |
a+1 |
3 |
|
3x+2 |
x2-1 |
x |
x+1 |
y+1 |
x+1 |
x+1 |
y+1 |
1 |
x2 |
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