12 |
m2-9 |
2 |
m+3 |
A.
| B.
| C.
| D.
|
12 |
m2-9 |
2(m-3) |
m2-9 |
6+2m |
m2-9 |
2(m+3) |
(m+3)(m-3) |
2 |
m-3 |
1 |
m |
1 |
n |
1 |
a-2 |
4 |
a2-4 |
1 |
2 |
1 |
1×2 |
1 |
2 |
1 |
3 |
1 |
2×3 |
1 |
3 |
1 |
4 |
1 |
3×4 |
1 |
n |
1 |
n+1 |
1 |
n(n+1) |
1 |
2×3 |
1 |
3×4 |
1 |
4×5 |
1 |
x(x+1) |
2 |
a2-1 |
1 |
1-a |
x2-2xy+y2 |
x2y-xy2 |
x2-y2 |
xy |
A.
| ||||||
B.
| ||||||
C.
| ||||||
D.
|
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