# How do I use a graphing calculator to find the roots of the polynomial equation x^3-4x^2+x+26=0?

To find the roots of x^3−4x^2+x+26=0, I graphed the equation:
I also used the CAS feature of my calculator to get me the resulting factor: ${x}^{2} - 6 x + 13$. Solving this quadratic with the quadratic equation yields: $\frac{6 + \sqrt{36 - 52}}{2} = \frac{6 + \sqrt{- 16}}{2}$ which simplifies to $3 \pm 2 i$ .