x立方-16x-x立方+9x+3x平方-27+5x详解
问题描述:
x立方-16x-x立方+9x+3x平方-27+5x详解
答
x立方-16x-x立方+9x+3x平方-27+5x
=(1-1)x^3+3x^2+(-16+9+5)x-27
=3x^2-2x-27