Chapter 12 - Data Analysis and Probability - 12-6 Permutations and Combinations - Practice and Problem-Solving Exercises - Page 768: 74

$x= -6.81 , 0.81 $

Given Information a= 2 b=12 c=-11 Use the Quadratic Formula $x$ = $\frac{- b+ \sqrt b^{2}- 4 ac}{2a} $= $\frac{-12 + \sqrt 12^{2}-4(2) (-11)}{2(2)}$ $x= \frac{-12+\sqrt 232}{4}$ $x\approx -6.81, 0.81$