13-2x |
11-2x |
17-2x |
15-2x |
19-2x |
17-2x |
11-2x |
9-2x |
2 |
11-2x |
2 |
15-2x |
2 |
17-2x |
2 |
9-2x |
1 |
11-2x |
1 |
9-2x |
1 |
17-2x |
1 |
15-2x |
-2 |
(11-2x)(9-2x) |
-2 |
(17-2x)(15-2x) |
13 |
2 |
13 |
2 |
13 |
2 |
a+2 |
1-a 2 |
2 |
1+a |
a |
a-1 |
x |
x-1 |
2 |
x |
2 |
x-2 |
1 |
x |
A.x=1 | B.x=-1 | C.x=2 | D.x=-2 |
3 |
x |
ax |
x+1 |
3 |
x+1 |
A.0 | B.-1 | C.3 | D.0或-1 |
6 |
x2-1 |
3 |
x-1 |
A.-1或4 | B.-1 | C.4 | D.-4 |
3x |
x2-1 |
x2-1 |
3x |
5 |
2 |
3x |
x2-1 |
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