Solve using the quadratic formula or by completing the square:

$\displaystyle {r}^{{2}}-{16}{r}+{3}=-{115}$ 

Write a rational solution as an integer or reduced fraction. Write complex solutions in the form $\displaystyle {a}+{b}{i}$. For square roots, consider using the Math Quill. If there are multiple solutions, separate them using commas. Click No solution if there are no solutions.