A.3x+3y=6xy | B.2a2+3a3=5a5 |
C.3m-3m=0 | D.7x-5x=2 |
A.-(x-6)=-x-6 | B.-a+b=-(a+b) | C.30-x=5(6-x) | D.3(x-8)=3x-24 |
A.0 | B.x2 | C.y2 | D.z2 |
A.3xy2和5x2y | B.mn和3m | C.
| D.-6a和8a |
A.-xn+2yn与ynxn+2(n为正整数) | ||
B.5x2y与-3yx2 | ||
C.12与
| ||
D.0.1a2b与0.2ab2 |
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