1 |
a-2 |
4 |
a2-4 |
1 |
a-2 |
4 |
(a+2)(a-2) |
a+2 |
(a+2)(a-2) |
4 |
(a+2)(a-2) |
a+2-4 |
(a+2)(a-2) |
a-2 |
(a+2)(a-2) |
1 |
a+2 |
a2+ab+b2 |
a3-b3 |
b2 |
b2-2ab+b2 |
ab+b2 |
a2-b2 |
a |
a2-b2 |
1 |
a+b |
x-1 |
x+1 |
4x |
x2-1 |
n-m |
m-2n |
m2-n2 |
m2-4mn+4n2 |
4 |
x2-4 |
2 |
x+2 |
1 |
x-2 |
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