Question
Answer
$$-n(-n-8)=n^2+8n$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-n(-n-8)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-(-n^2-8n) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}n^2+8n\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{n} $ by $ \left( -n-8\right) $ $$ \color{blue}{n} \cdot \left( -n-8\right) = -n^2-8n $$ |
| ② | Remove the parentheses by changing the sign of each term within them. $$ - \left(-n^2-8n \right) = n^2+8n $$ |
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