Answer
$s=9$ and $s=1$.
Work Step by Step
The given equation is
$\Rightarrow (s-9)(s-1)=0$
Use zero-product property rule.
$\Rightarrow s-9=0$ or $s-1=0$
Solve for $s$.
$\Rightarrow s=9$ or $s=1$
Check:-
$s=9$
$\Rightarrow (9-9)(9-1)=0$
$\Rightarrow 0(8)=0$
$\Rightarrow 0=0$
True.
Check:-
$s=1$
$\Rightarrow (1-9)(1-1)=0$
$\Rightarrow -8(0)=0$
$\Rightarrow 0=0$
True.
Hence, the solutions are $s=9$ and $s=1$.
