1 |
5 |
A.m=3,n=1 | B.m=1,n=3 | C.m=1,n=1 | D.m=3,n=3 |
A.3a2b,
| B.-x3y2,2y2x3 | ||
C.-3a2y2,-3a2b2 | D.5ab,-5abc |
A.2x3+9x3=11x6 | B.4a+5b=9ab |
C.9y2-4y2=5 | D.7mn2-7n2m=0 |
A.3x2y2和-3xy2 | B.
| ||||
C.5xyz和7yxB | D.0.2a2b和0.2ab2 |
A.3x2y与-6xy2 | B.-ab3与b3a | ||
C.12和0 | D.2xyz与-
|
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