因式分解-6x^2-x-9x^3

问题描述:

因式分解-6x^2-x-9x^3

-6x^2-x-9x^3
=-x(6x+1+9x^2)

-6x^2-x-9x^3
= -x ( 6x +1 + 9x²)

-6x^2-x-9x^3
=-x(1+6x+9x^2)
=-x(3x+1)^2