Question
Answer
$$-7v^5(-2v^3-9v)=14v^8+63v^6$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-7v^5(-2v^3-9v)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-(-14v^8-63v^6) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}14v^8+63v^6\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{7v^5} $ by $ \left( -2v^3-9v\right) $ $$ \color{blue}{7v^5} \cdot \left( -2v^3-9v\right) = -14v^8-63v^6 $$ |
| ② | Remove the parentheses by changing the sign of each term within them. $$ - \left(-14v^8-63v^6 \right) = 14v^8+63v^6 $$ |
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