4ab |
a-b |
4ab |
a+b |
3 |
2 |
1 |
2 |
x+4 |
x-1 |
4 |
x2-1 |
4ab |
a-b |
4ab |
a+b |
a2-2ab+b2+4ab |
a-b |
a2+2ab+b2-4ab |
a+b |
(a+b)2 |
a-b |
(a-b)2 |
a+b |
3 |
2 |
1 |
2 |
3 |
2 |
1 |
2 |
3 |
2 |
1 |
2 |
1 |
5 |
1 |
5 |
24 |
25 |
1 |
5 |
1 |
5 |
1 |
x |
1 |
c |
1 |
c |
1 |
x |
1 |
c |
-1 |
x |
-1 |
c |
1 |
c |
2 |
x |
2 |
c |
2 |
c |
3 |
x |
3 |
c |
3 |
c |
m |
x |
m |
c |
2 |
x-1 |
2 |
a-1 |
x |
x-3 |
m |
x-3 |
A.4 | B.3 | C.2 | D.1 |
x-2 |
x+2 |
16 |
x2-4 |
A.有一个解是x=2 | B.有一个解是x=-2 |
C.有两个解是x=2和x=-2 | D.没有解 |
2 |
3x-1 |
3 |
6x-2 |
12 |
x2-9 |
2 |
3-x |
1 |
x+3 |
8 |
4-x2 |
2 |
2-x |
A.x=-2 | B.x=2 | C.x=4 | D.无解 |
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