1 |
3 |
13 |
3 |
A.2x2y与-3xy2 | B.4a2bc与
| ||
C.xyz与2xy | D.6a2b与3a2c |
A.2a+3b=6ab | B.ab-ba=0 | C.5a3-4a3=1 | D.-a-a=0 |
1 |
2 |
A.a=4,b=2,c=3 | B.a=4,b=4,c=3 |
C.a=4,b=3,c=2 | D.a=4,b=3,c=4 |
A.3a-4b=4ab | B.3ab-3ba=0 |
C.5x2+3x3=8x5 | D.4x2y-5xy2=-x2y |
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