## Algebra 2 (1st Edition)

$$x=-\frac{5}{2}$$
Solving the equation using the quadratic formula, we obtain: $$x_{1,\:2}=\frac{-20\pm \sqrt{20^2-4\cdot \:4\cdot \:25}}{2\cdot \:4} \\ x=-\frac{5}{2}$$