x2-9 |
x2+6x+9 |
3x3+9x2 |
x2-3x |
1 |
3 |
2x |
x3+2x2+x |
x-1 |
x2+x |
4x2-1 |
2-4x |
4x2+4x+1 |
x |
1 |
4 |
(x+3)(x-3) |
(x+3)2 |
3x2(x+3) |
x(x-3) |
1 |
3 |
2x |
x(x+1)2 |
x(x+1) |
x-1 |
2x |
x2-1 |
-4 |
4-1 |
4 |
3 |
(2x+1)(2x-1) |
2(2x-1) |
x |
(2x+1)2 |
x |
2(2x+1) |
1 |
4 |
1 |
4 |
a2-b2 |
a2b-ab2 |
a2+b2 |
2ab |
3 |
11 |
3 |
11 |
x-3 |
3x2-6x |
5 |
x-2 |
| ||
3 |
x2-3x |
x-2 |
3 |
2-x |
A.
| B.
| C.
| D.
|
x2+6x+9 |
2(x+3) |
x2-3x |
x |
y+1 |
x+1 |
y |
x |
A.0 | B.正数 | C.负数 | D.非负数 |
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