Question

What are the roots of the following polynomial?

Answer 1

\(\ \Huge 3x^4-13x^3+15x^2-4 ?\)

Answer 2

I got the following roots: \(\ \huge (x-2)(x-2)(x-\frac{1+\sqrt{11}}{6})
(x-\frac{1-\sqrt{11}}{6}) \).

Answer 3

Wolfram|Alpha; however, got \(\ \Huge \sqrt{13} not \sqrt{11} \).

Answer 4

The quadratic with the x-2 factored out is \(\ \Huge 3x^2-x-1=0 \).