把多项式3x+x³-5x²-1按x的降幂排列是______

问题描述:

把多项式3x+x³-5x²-1按x的降幂排列是______

把多项式3x+x³-5x²-1按x的降幂排列是__x³-5x²+3x-1___

把多项式3x+x³-5x²-1按x的降幂排列是______x³-5x²+3x-1