x2+1 |
x2-1 |
x-2 |
x-1 |
x-2 |
x |
x2+1 |
x2-1 |
x-2 |
x-1 |
x-2 |
x |
x2+1 |
(x+1)(x-1) |
x-2 |
x-1 |
x |
x-2 |
1 |
x+1 |
9 x2y-4 |
-2 x-1y |
9 x3 |
2 y5 |
1 |
x+2 |
1 |
x+1 |
1 |
3 |
3 |
a+1 |
a-1 |
a2+a |
a2-1 |
3 |
a-3 |
a |
3-a |
x2 |
y-x |
y2 |
y-x |
A.-x-y | B.x-y | C.x+y | D.y-x |
4a2 |
2a-b |
b2 |
b-2a |
A.-2a-b | B.b-2a | C.2a-b | D.2a+b |
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