4x+3y |
-3xy |
4x+9y |
3xy |
A.-
| B.-
| C.
| D.-
|
4x+3y |
-3xy |
4x+9y |
3xy |
(4x+9y)-(4x+3y) |
3xy |
4x+9y-4x-3y |
3xy |
6y |
3xy |
2 |
x |
x2 |
y-x |
y2 |
y-x |
a+1 |
a-1 |
a2+a |
a2-1 |
y2 |
x2-xy |
x |
y-x |
b+m |
a+m |
a |
b |
2n-m |
3nm |
m+2n |
3mn |
a |
a2-1 |
3a+1 |
a2-1 |
2a+3 |
1-a2 |
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