Question
Answer
$$-7y^2-7y+2y^2+2y-9=-5y^2-5y-9$$
Explanation
| $$ \begin{aligned}-7y^2-7y+2y^2+2y-9& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}-5y^2-5y-9\end{aligned} $$ | |
| ① | Combine like terms: $$ \color{blue}{-7y^2} \color{red}{-7y} + \color{blue}{2y^2} + \color{red}{2y} -9 = \color{blue}{-5y^2} \color{red}{-5y} -9 $$ |
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