已知A=x^3-5x^2,B=x^2-11x+6,则A-B=-------

问题描述:

已知A=x^3-5x^2,B=x^2-11x+6,则A-B=-------

A-B
=x^3-5x^2,-(x^2-11x+6)
=x^3-5x^2-x^2+11x-6
=x^3-6x^2+11x-6