$$22s = 11s^2$$
Answer
$$ \begin{matrix}s_1 = 0 & s_2 = 2 \\[1 em] \end{matrix} $$
Explanation
$$ \begin{aligned} 22s &= 11s^2&& \text{move all terms to the left hand side } \\[1 em]22s-11s^2 &= 0&& \text{simplify left side} \\[1 em]-11s^2+22s &= 0&& \\[1 em] \end{aligned} $$
In order to solve $ \color{blue}{ -11x^{2}+22x = 0 } $, first we need to factor our $ x $.
$$ -11x^{2}+22x = x \left( -11x+22 \right) $$$ x = 0 $ is a root of multiplicity $ 1 $.
The second root can be found by solving equation $ -11x+22 = 0$.
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