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