Question

How do I find the roots of this polynomial equation?

x³ - 18x + 27

I don't want the "bUt JuSt UsE yOuR cAlCuLaToR" answer. I want to know how to solve it.

Answer 1

Here is how you find the answer: (not "bUt JuSt UsE yOuR cAlCuLaToR")

Factor x3−18x+27

x3−18x+27

=(x−3)(x2+3x−9)

Hope this helps!!!!!!!