3m+n等于4x二次方-5x+3,m等于x三次方-2x二次方+5x-6,求多项式m
问题描述:
3m+n等于4x二次方-5x+3,m等于x三次方-2x二次方+5x-6,求多项式m
答
不是求N吗?
N=4X^2-5X+3-3M
=4X^2-5X+3-3(X^3-2X^2+5X-6)
=4X^2-5X+3-3X^3+6X^2-15X+18
=-3X^3+10X^2-20X+21.