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