Answer
$$-c(11c+4)=-11c^2-4c$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-c(11c+4)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-(11c^2+4c) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-11c^2-4c\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{c} $ by $ \left( 11c+4\right) $ $$ \color{blue}{c} \cdot \left( 11c+4\right) = 11c^2+4c $$ |
| ② | Remove the parentheses by changing the sign of each term within them. $$ - \left(11c^2+4c \right) = -11c^2-4c $$ |
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