## Elementary Algebra

We use completing the square to obtain: $x^2 +4x -2/3 = 0 \\ x^2 +4x = 2/3 \\ x^2 + 4x +4 = 14/3 \\ (x+2)^2 = 14/3 \\ x+2 = \sqrt{14/3} \\ x = \frac{-6 \pm\sqrt{42}}{3}$\$