Answer
$x=\left\{
-8.69, 0.69
\right\}
$
Work Step by Step
The standard form of the given equation is
\begin{align*}
x^2+2x+6x-6&=0\\
x^2+8x-6&=0
\end{align*}
Using a graphing software, the graph of the given equation is shown below.
The solutions of the equation are the $x$-values when the graph crosses the $x-$axis. Hence, based on the graph, the solutions are $
x=\left\{
-8.69, 0.69
\right\}
.$
