A.32与43 | B.3c2b与-8b2c | ||
C.
| D.4mn2与2m2n |
1 |
2 |
A.a2+a3=a5 | B.x+x=x2 | C.4x2-3x3=1 | D.-(-x+1)=x-1 |
A.2a+3b=5ab | B.3ab-5ba=-2ab |
C.-52+4a2=9a2 | D.4ab-ab=4 |
A.3x2y-2yx2=x2y | B.5y-3y=2 |
C.7a+a=7a2 | D.3a+2b=5ab |
A.a2+a2=a4 | B.a2+a2=2a2 | C.(-2)2+22=0 | D.a2+b2=a2b2 |
© 2017-2019 超级试练试题库,All Rights Reserved.