a2-12a+36 |
b-8 |
A.c>8 | B.8<c<14 | C.6<c<8 | D.8≤c<14 |
2x+1 |
(x+y)2 |
A.2.5 | B.-2.5 | C.3.5 | D.-3.5 |
121 |
12321 |
12345678987654321 |
c-5 |
A.等腰三角形 | B.直角三角形 |
C.等腰直角三角形 | D.等边三角形 |
4a-5b |
a-b-1 |
ab |
|
A.
| B.5 | C.
| D.2-
|
22 |
(-3)2 |
52 |
(-6)2 |
72 |
02 |
a2 |
4 |
9 |
25 |
36 |
49 |
0 |
a |
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