Question

将多项式3x的平方y-2x的立方-3xy的平方-y的立方按x的降幂排列为?按y的降幂排列为?

Answer 1

3x^2y-2x^3-3xy^2-y^3

按X降幂排序为：-2x^3+3x^2y-3xy^2-y^3

按y降幂排序为：-y^3-3xy^2+3x^2y-2x^3