9 |
7 |
1 |
5 |
2m |
3n |
3n |
p |
m2n |
p2 |
2a |
a2-9 |
1 |
a-3 |
1 |
a |
1 |
b |
a2-b2 |
ab |
2m |
3n |
9n2 |
p2 |
p2 |
m2n |
6 |
m |
2a |
(a+3)(a-3) |
(a+3) |
(a+3)(a-3) |
a-3 |
(a+3)(a-3) |
1 |
a+3 |
b-a |
ab |
ab |
(a+b)(a-b) |
1 |
a+b |
8 |
x+1 |
x+3 |
x+1 |
2 |
(-5)2 |
2 | ||
|
-20 |
0.2 |
| ||
3 |
4-x |
x-2 |
12 |
x-2 |
2x |
x2-4 |
4 |
x-2 |
x+3y-z |
2x-y+z |
A.
| B.7 | C.3 | D.
|
3 |
2 |
x2 |
x-1 |
1 |
1-x |
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