#### Answer

$x\approx -5.46, 1.46$

#### Work Step by Step

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