2 |
3 |
3 |
5 |
2 |
3 |
3 |
5 |
|
1 |
3 |
A.1与0 | B.3x2y与-yx2 | ||
C.
| D.m2n与4nm2 |
A.-32=9 | B.mn+mn=m2n2 | ||||
C.326000=3.26×106 | D.(-
|
1 |
2 |
1 |
4 |
2 |
3 |
5 |
6 |
1 |
2 |
A.a2-(2a-b2+b)=a2-2a-b2+b |
B.-(2x+y)-(-x2+y2)=-2x+y+x2-y2 |
C.2x2-3(x-5)=2x2-3x+5 |
D.-a3-[-4a2+(1-3a)]=-a3+4a2-1+3a |
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