## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$$x=- .764, -5.24$$
The quadratic formula states: $$x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$$ Solving by using the quadratic formula to approximate the solution, we find: $$x_{1,\:2}=\frac{-6\pm \sqrt{6^2-4\cdot \:1\cdot \:4}}{2\cdot \:1}\\ x=-3+\sqrt{5},\:x=-3-\sqrt{5}\\ x=- .764, -5.24$$