$$ \begin{aligned}-0.1328(s+132400)(s-9875)& \xlongequal{ }-(0s+0)(s-9875) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-(0s^2+0s+0s+0) \xlongequal{ } \\[1 em] & \xlongequal{ }-0\end{aligned} $$ | |
① | Multiply each term of $ \left( \color{blue}{0s0}\right) $ by each term in $ \left( s-9875\right) $. $$ \left( \color{blue}{0s0}\right) \cdot \left( s-9875\right) = 0s^2 \cancel{0s} \cancel{0s}0 $$ |