2 |
x+3 |
2 |
3-x |
2x+18 |
x2-9 |
A.12 | B.15 | C.18 | D.20 |
2 |
x+3 |
2 |
3-x |
2x+18 |
x2-9 |
2x-6-2x-6+2x+18 |
(x+3)(x-3) |
2(x+3) |
(x+3)(x-3) |
2 |
x-3 |
a2b+ab2 |
a2+2ab+b2 |
a-b |
a2-b2 |
7 |
7 |
a2 |
a-2 |
4 |
a-2 |
1 |
a2+2a |
3 |
x+3 |
x-3 |
x+1 |
x2+4x+3 |
a |
ab-b2 |
b |
a2-ab |
a2+b2 |
2ab |
3 |
3 |
x |
x+y |
y |
x-y |
2xy |
x2-y2 |
3 |
3 |
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