把多项式3x2y-5xy3+y2-2x3按x的降幂排列是 _ .
问题描述:
把多项式3x2y-5xy3+y2-2x3按x的降幂排列是 ___ .
答
多项式3x2y-5xy3+y2-2x3的各项为3x2y,-5xy3,y2,-2x3,
按x的降幂排列为-2x3+3x2y-5xy3+y2.
故答案为:-2x3+3x2y-5xy3+y2.