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