Find all real number soultions. x^3-9x^2+27x-27

Answer 1

If you want solutions, you have to write an equation, not just a polynomial.

I assume you want the solution(s) to
x^3 -9x^2 +27x -27 = 0

Since that can be written (x-3)^3 = 0, the only solution is x = 3.