A.2a与a2 | B.5a2b与-a2b | ||
C.
| D.0.3mn2与0.3xy2 |
A.3x2-2x2=1 | B.3x2+2x2=5x4 |
C.3x2y-3yx2=0 | D.4x+y=4xy |
A.a-(3b-2c-1)=a-3b+2c-1 |
B.3x3-[2x2-(-4x+1)]=3x3-2x2-4x+1 |
C.2x2-3(x-1)=2x2-3x+1 |
D.-(2x-y)-(-a+2b)=-2x+y+a+2b |
A.5y | B.8x | C.-5y | D.-8x-5y |
A.2x+1 | B.2x | C.5x+4 | D.3x-2 |
© 2017-2019 超级试练试题库,All Rights Reserved.