x2-4 |
x2-4x+4 |
x2-1 |
x |
2 |
3x |
x-1 |
x |
x+1 |
x2-1 |
x |
x-y |
x2-2xy+y2 |
xy+y2 |
x2-y2 |
xy |
y-1 |
1 | ||
2-
|
1 | ||
2+
|
(x+2)(x-2) |
(x-2)2 |
x2-1 |
x |
(x+2)(x2-1) |
x(x-2) |
2 |
(
| ||||||
(
|
-2 | ||
5-4
|
10 |
7 |
8
| ||
7 |
3x(x+1)-x(x-1) |
x2-1 |
x2-1 |
x |
1 |
x-y |
y |
x-y |
xy |
y-1 |
xy |
x-y |
1 | ||
2-
|
1 | ||
2+
|
3 |
3 |
(2+
| ||||
(2+
|
| ||
6 |
科目:初中数学 来源: 题型:
1 | ||
|
1 |
x-1 |
1 |
3 |
p+q |
2 |
pq |
1 |
10 |
1 |
12 |
1 |
12 |
1 |
15 |
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