1/2xy−4x2y3+4y2−x3按x的升幂排列是_.

问题描述:

1
2
xy−4x2y3+4y2x3按x的升幂排列是______.

多项式

1
2
xy-4x2y3+4y2-x3的各项是
1
2
xy,-4x2y3,4y2,-x3
按x升幂排列为4y2+
1
2
xy-4x2y3-x3
故答案为:4y2+
1
2
xy-4x2y3-x3