Solve eight order polynomial with variable coefficients?

Questions
1

I want to solve eight order following polynomials and obtain the x depending on alpha.
Aj=Aj(alpha)

A8 * x^8 + A7 * x^7 + A6 * x^6 + A5 * x^5 + A4 * x^4 + A3 * x^3 + A2 * x^2 + A1 * x + 
  A0=0

How do I get this? Is it possible?
Thanks,

solve.nb (32.2 KB)

2

The solution obtained in the attached notebook is already a parametrized solution set, dependent on alpha.