2a |
a+b |
2ab |
a2-b2 |
2x |
x2-4y2 |
1 |
x-2y |
2a |
a+b |
(a+b)(a-b) |
2ab |
a-b |
b |
2x |
(x+2y)(x-2y) |
x+2y |
(x+2y)(x-2y) |
2x-x-2y |
(x+2y)(x-2y) |
x-2y |
(x+2y)(x-2y) |
1 |
x+2y |
1 |
2×3 |
1 |
2 |
1 |
3 |
1 |
3×5 |
1 |
2 |
1 |
3 |
1 |
5 |
1 |
1×4 |
1 |
4×7 |
1 |
7×10 |
1 |
(3n-2)(3n+1) |
12 |
m2-9 |
2 |
m+3 |
A.
| B.
| C.
| D.
|
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) |
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