化简(9x^2-6x+1)*3x+1/9x^2-1
问题描述:
化简(9x^2-6x+1)*3x+1/9x^2-1
3x前和-1后有括号。话说结果是3x-1么?
答
(9x^2-6x+1)*(3x+1)/(9x^2-1)
=(3x-1)^2*(3x+1)/[(3x+1)(3x-1)]
=3x-1
你对了