1. The problem statement, all variables and given/known data Hello there! I'm trying to find the roots of the following cubic polynomial x^3 - 10x + 18 = 0 3. The attempt at a solution I did the following: I rewrite 18 as 18 = - (x^3 - 10x) then I did back substitution and factored out x^3 - 10x - x^3 + 10x = 0 or x(x^2-10) - x(x^2-10) = 0 => (x - x)(x^2-10) = 0 => x = sqrt(10) I'm not sure if what I did is legit and correct. I think is wrong. Is it valid?