(x-2)(x*x-6x-9)=x(x-5)(x-3),求6x的算术平方根
问题描述:
(x-2)(x*x-6x-9)=x(x-5)(x-3),求6x的算术平方根
答
(x-2)(x*x-6x-9)=x(x-5)(x-3)
x^3-6x^2-9x-2x^2+12x+18=x^3-8x^2+15x
x=3/2
6x=9
6x的算术平方根为3