3x2y-5x3y2+2-x4+x2y+2x4 |
4 |
3x2y-5x3y2+2-x4+x2y+2x4 |
4 |
4x2y-5x3y2+2+x4 |
4 |
4x2y-5x3y2+2+x4 |
4 |
3x2y-5x3y2+2-x4+x2y+2x4 |
4 |
2a2-6a+3 |
4 |
A.
| ||
B.
| ||
C.-mn5是5次单项式 | ||
D.-x2y-2x3y是四次多项式 |
1-3a3b3+2a2b |
4 |
A.它是关于t的二次三项式 |
B.当t=-1时,此多项式的值为0 |
C.它的常数项是-1 |
D.二次项的系数是2 |
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