Chapter 4 Quadratic Functions and Factoring - 4.8 Use the Quadratic Formula and the Discriminant - Guided Practice for Examples 1, 2, and 3 - Page 293: 3

$$x=0.5\pm1.0723i$$

We first check that the function is in the form $ax^2+bx+c$. Then, using the quadratic formula, we obtain: $$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$$ $$x=\frac{-5\pm \sqrt{(5)^2-4(-5)(-7)}}{2(-5)}$$ $$x=0.5\pm1.0723i$$