Chapter 12 - Data Analysis and Probability - 12-6 Permutations and Combinations - Practice and Problem-Solving Exercises - Page 768: 76

$x\approx -5.46, 1.46$

Given information: a=1 b=4 c= -8 By using the Quadratic Formula: $x$= $\frac{- b + \sqrt b^{2}- 4ac}{2a}$ = $- 4 + \frac{\sqrt 4^{2}- 4(1)(-8)}{2(1)}$ $x$= $\frac{-4+ \sqrt 48}{2}$ $x\approx -5.46, 1.46$