12 |
m2-9 |
2 |
m-3 |
1 |
6x-2 |
1 |
2 |
2 |
1-3x |
12 |
m2-9 |
2 |
m-3 |
12 |
(m+3)(m-3) |
2(m+3) |
(m+3)(m-3) |
12-2m-6 |
(m+3)(m-3) |
2 |
m+3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
a |
a-3 |
3 |
a-3 |
3 |
a |
2 |
a |
a |
a+2b |
2b |
a+2b |
x-1 |
x |
x |
x+1 |
A.m>n | B.m=n | C.m<n | D.无法确定 |
2 |
a-1 |
a2-1 |
a2-2a+1 |
x2 |
y-x |
y2 |
y-x |
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