Answer
No real solution
Work Step by Step
We rewrite the equation: $$
\begin{aligned}
23 & =-2(s+9)^2+5 \\
23-5 & =-2(s+9)^2 \\
18 & =-2(s+9)^2 \\
-\frac{18}{2} & =(s+9)^2 \\
-9 & =(s+9)^2.
\end{aligned}
$$ As the left side is negative and the right side is positive, the equatikn has no real solution.
