A.-mn与
| B.4ab与4abc | ||||
C.
| D.x2y与yx2 |
3 |
2 |
2 |
3 |
2 |
3 |
A.a+a=a2 | B.a+b=ab | C.7a2-3a2=4 | D.2a-a=a |
A.32与a2 | B.4a2与4b2 | C.2ab与-3ba | D.2abc与2ab |
A.m2-(2m-n-p)=m2-2m+n+p |
B.m-n+p-q=m-(n+p-q) |
C.3m-5n-1+2p=-(-3m)-[5n-(2p-1)] |
D.m+1-(-n+p)=-(-1-n-m+p) |
1 |
3 |
1 |
5 |
8 |
15 |
A.2 | B.1 | C.-2 | D.-1 |
A.2a+2b=4ab | B.3x2-x2=2 | C.5mn-5nm=0 | D.a-a=a2 |
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