3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
A.7mn-5mn=2 | B.3a2+2a2=5a4 |
C.8x+8y=8xy | D.-12x2y+12x2y=0 |
A.x5-x4=x | B.x+x=x2 |
C.x3+2x5=3x3 | D.-x3+3x3=2x3 |
A.-7a+4b=-11ab | B.-3ab2-ab2=-4ab2 |
C.3x-5x=2x | D.3x2+x=4x3 |
A.ab2和ab2c | B.-x2y3和x3y2 |
C.5和-62 | D.-m6n和mn6 |
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