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