Question
Answer
$$-y(13x^4+15x^3+1)=-13x^4y-15x^3y-y$$
Explanation
Tap the blue circles to see an explanation.
| $$ \begin{aligned}-y(13x^4+15x^3+1)& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-(13x^4y+15x^3y+y) \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}-13x^4y-15x^3y-y\end{aligned} $$ | |
| ① | Multiply $ \color{blue}{y} $ by $ \left( 13x^4+15x^3+1\right) $ $$ \color{blue}{y} \cdot \left( 13x^4+15x^3+1\right) = 13x^4y+15x^3y+y $$ |
| ② | Remove the parentheses by changing the sign of each term within them. $$ - \left(13x^4y+15x^3y+y \right) = -13x^4y-15x^3y-y $$ |
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