Answer
No real solution
Work Step by Step
Use the quadratic formula.$$
\begin{aligned}
3 x^2+4 x+20=0.
\end{aligned}
$$Set $$
\begin{aligned}
a & =3 \\
b& =4\\
c & =20
\end{aligned}
$$ $$
\begin{aligned}
x & =\frac{-4 \pm \sqrt{4^2-4(3)(20)}}{2(3)} \\
& =\frac{-4 \pm \sqrt{-224}}{6}.
\end{aligned}
$$
There is no real solution.
