I was trying to solve a cubic equation which is :
$ -\lambda³ -\lambda² + 10 \lambda - 8 = 0$
I googled about it and I found the Rational Root theorem which is takes time to do it, but I found that some people are solving cubic equation by factoring, like this equation :
x3+4x2+x-6 = 0 it will be
I tried to do the same with my equation but it's hard to find what is the common factorial.
Is there any way to determine what is the common factorial as in the example I gave you